Deciding between the Helix Midnight Luxe and the Plank Firm, you’ll need to figure out your sleep style. The Helix Midnight Luxe is a medium hybrid, featuring a soft, quilted pillow top and zoned lumbar support to keep your spine aligned. It’s ideal if you like a balance of cushion and support, especially for side or combination sleepers.
The Plank Firm, on the other hand, is all about firmness. This flippable mattress offers a firm side and an extra-firm side, letting you choose the level of support you need. It’s perfect for back and stomach sleepers or anyone who prefers a solid surface that keeps you from sinking in too much.
Both mattresses are shipped in a box, designed with support in mind, and built to prevent sagging. But where they differ is in feel—the Helix Midnight Luxe leans on a more plush and contouring feel, while Plank Firm is all about stability and firmness. What you choose comes down to whether you want a soft, cradling sleep or a firm, flat surface that keeps you fully supported.
Key Takeaways
- When you compare the Helix Midnight Luxe vs Plank Firm, you’re choosing between a medium, pressure-relieving hybrid and an ultra-firm, flippable mattress built for strong support.
- If you’re a side sleeper or combination sleeper, you’ll likely prefer the Helix Midnight Luxe for its contouring memory foam and targeted lumbar support.
- On the other hand, if you sleep on your back or stomach and need extra spinal alignment, the Plank Firm delivers a firm, no-sink feel.
- The Helix Midnight Luxe focuses on luxury upgrades like enhanced cooling, zoned coils, and plush comfort layers for balanced support and motion isolation.
- The Plank Firm stands out with its dual-sided firmness design, giving you two firmness levels in one mattress for long-term durability and customizable comfort.

Listen to our Podcast: Helix Midnight Luxe vs Plank Firm
Helix Midnight Luxe
A premium medium firm hybrid mattress featuring a premium cooling pillow top and zoned lumbar support foam.
Credits: Helix
- Excellent pressure point relief for hips and shoulders
- Both cooling cover options are effective in preventing overheating
- Ideal for couples due to its extremely low motion transfer
- Might be too expensive for budget-conscious shoppers
- Not too firm and supportive for stomach sleepers
Verdict
The Helix Midnight Luxe is designed to offer a balanced, comfortable sleep experience, making it a strong choice for anyone dealing with back or hip pain or pressure in the shoulders. Its feature is the combination of pressure relief and reliable support.
The plush, quilted pillow top provides a soft, contouring feel that cushions sensitive areas like the shoulders and hips, while the zoned coils underneath keep the spine properly aligned and prevent excessive sinking. This design helps reduce aches and stiffness that often result from poor alignment or pressure build-up during the night.
The mattress is especially well-suited for side sleepers and combination sleepers who need a surface that is soft enough to relieve pressure points but supportive enough to maintain proper posture throughout the night.
For anyone whose current mattress leaves them sore, tossing and turning, or waking up unrested, the Helix Midnight Luxe offers a well-built, restorative solution that prioritizes comfort, support, and long-term sleep quality.
Helix Midnight Luxe
Helix Midnight Luxe
Helix Midnight Luxe Features and Benefits
The Helix Midnight Luxe is a medium-feel hybrid mattress with a soft, quilted pillow-top, supportive coils, and a comfort layer that cushions shoulders and hips. It offers a cozy, plush feel on top while staying supportive underneath, so you don’t sink too much. Compared to all-foam beds, it provides a more “lifted” feel, making movement easier and support steadier.
This mattress is ideal for side sleepers or combination sleepers who need both comfort and proper alignment. It helps relieve shoulder and hip pressure, reduces soreness from overly firm beds, and allows for longer, more restful sleep without constant tossing and turning.
Is The Helix Midnight Luxe A Good Mattress For You?
The Helix Midnight Luxe is ideal if you’re a side or combination sleeper who wants a medium-feel mattress that cushions shoulders and hips while keeping your body supported. Its “cozy on top, supportive underneath” hybrid design, plus optional cooling upgrades, makes it great for a good night’s sleep.
Avoid it if you prefer extra-firm support, are mainly a stomach sleeper, or need higher weight capacity—other Helix models suit those needs better. Before buying, consider your sleep position, firmness preference, body weight, tendency to sleep hot, and budget.
Our Advice When Considering To Get A Helix Midnight Luxe
- Zoned coils provide advanced lumbar and edge support
- Provides exceptional pressure relief and motion isolation
- Optional cooling cover upgrade for a much cooler sleep
Who We Don’t Recommend To Get A Helix Midnight Luxe
- Might be too soft for stomach sleepers
- Higher price tag compared to other hybrid models
Plank Firm
A flippable all-foam mattress featuring high-density foam layers for superior support and comfort.
Credits: Plank
- Flippable design offers customized comfort
- Firm support reduces spinal stress and alleviates back pain
- Good response time makes it easier to move around
- Firmness may not be suitable for light sleepers under 200 lbs or side sleepers
- $99 processing fee for returns
Verdict
The Plank Firm is built to support you. A mattress that’s too soft or uneven can cause back or hip pain, restless nights from pressure points, overheating, or even sleep disruption if your partner moves during the night.
The Plank Firm is excellent if you prefer a very firm feel. Its very firm support keeps you “on top” of the mattress so you don’t sink in, which can help maintain proper alignment. Its flippable design is great—one side is firm, the other extra-firm—so you can adjust the feel if one side feels too soft or too hard.
This versatility makes it especially well-suited for stomach and back sleepers, helping keep hips from dipping and reducing lower-back strain. For anyone who values firm, steady support and wants a mattress that can adapt to their firmness preferences, the Plank Firm is a great choice for a long-lasting mattress that prioritizes alignment, comfort, and better sleep quality.
Plank Firm
Plank Firm
Plank Firm Features and Benefits
The Plank Firm is a flippable mattress with two firmness options: firm and extra-firm. It’s designed for people who prefer a supportive sleep surface that keeps you on top of the bed instead of sinking in. If your current mattress feels too soft, leaving your hips and lower back sore in the morning, this mattress can help.
It’s especially good for back or stomach sleepers who need strong support to stay properly aligned. With the Plank Firm, you can wake up feeling stable and comfortable.
Is The Plank Firm A Good Mattress For You?
The Plank Firm is ideal for back or stomach sleepers who want a very firm mattress and the option to flip between firm and extra-firm. Side sleepers or anyone needing more pressure relief should look elsewhere, as it can feel too hard on the hips and shoulders.
Our Advice When Considering To Get A Plank Firm
- Comes in a flippable design—firm on one side, and extra firm on the other
- Alleviates back pain and improves lumbar support
- Affordable price point for shoppers with a limited budget
Who We Don’t Recommend To Get A Plank Firm
- Too firm for side sleepers and lightweight individuals
- Extra cost for a cooling cover
Helix Midnight Luxe vs Plank Firm: Design and Construction
Both the Helix Midnight Luxe and Plank Firm offer a quilted top, foam comfort layers, and optional cooling covers for a soft initial feel with supportive cores.
The key difference is the core: the Helix Midnight Luxe is a hybrid with individually wrapped coils, zoned support, and reinforced edges, giving more pressure relief, while Plank Firm is all-foam, flippable, and built around a high-density core for an extra-firm feel.
Helix provides detailed foam densities, showing why it balances comfort and support, whereas Plank focuses on its layered foam construction and flippable design to offer firm and extra-firm options in one mattress.
Helix Midnight Luxe
The Helix Midnight Luxe is a premium hybrid mattress with a quilted pillow top and multiple foam layers over up to 1,000 individually wrapped coils, including reinforced hip support and strong edges. You can choose a TENCEL or GlacioTex Cooling Cover, and add an optional ErgoAlign zoned layer for extra midsection support.
This design reduces shoulder and hip pressure, improves spinal alignment, and creates a stable, hotel-like feel. Backed by CertiPUR-US foams and GREENGUARD Gold certification, it’s built to deliver pressure relief, support, and comfort.
Credits: Helix
Plank Firm
The Plank Firm is a flippable all-foam mattress designed with both a firm and an extra-firm side. Its layers—a quilted top, thick high-density base foam, Supreme Response comfort layer, and quilted bottom—create a stable sleep surface that keeps your spine aligned and back supported.
The flippable design not only lets you adjust firmness but can extend the mattress’s lifespan. Breathable materials and an optional cooling cover help with temperature regulation. Endorsed for spinal support and back comfort, it’s built for people who truly want a firm, supportive sleep surface.
Credits: Plank
Helix Midnight Luxe vs Plank Firm: Materials Used
The Helix Midnight Luxe and Plank Firm both use comfort and support. The Helix Midnight Luxe is a hybrid with up to 1,000 coils plus multiple foam layers, offering pressure relief, bounce, and strong edge support. The Plank Firm is all-foam, flippable, and built for a flat, firm feel with thick high-density base foam and quilted tops.
Helix provides foam density numbers, showing softer quilted layers over denser support foams, while the Plank Firm is a bit firmer.

Overall Performance
The Helix Midnight Luxe and Plank Firm can help you sleep better. The Helix Midnight Luxe cushions shoulders and hips with quilted foam while pocketed coils support your spine—great for side and combo sleepers who want pressure relief.
The Plank Firm is all-foam and flippable, keeping you flat and stable—ideal for back and stomach sleepers who struggle with sinking hips. Side sleepers may find it too firm, while stomach sleepers may feel the Helix Midnight Luxe is too soft, so your sleep position really determines which works best.
Outer Layers
Helix Midnight Luxe
- Plush Pillow Top
- Breathable TENCEL Cover or GlacioTex Cooling Cover
Plank Firm
- Quilted Top and Bottom
- GlacioTex Cooling Cover
The Helix Midnight Luxe and Plank Firm both have similar outer layers. The Helix Midnight Luxe offers a plush pillow-top with breathable TENCEL or GlacioTex cooling covers, giving a soft and cushioned feel. The Plank Firm has a quilted top for a flatter, firmer feel, keeping you “on top” of the bed.
Cooling can be added, but it has a firmness and stability rather than plush comfort. Helix prioritizes softness and breathability, while Plank prioritizes firm support.
Comfort Layers
Helix Midnight Luxe
- Gel Memory Foam
- SupremeSupport Memory Foam
- Helix Responsive Foam
Plank Firm
- Quilted Top and Bottom
- Supreme Response Comfort Foam
The Helix Midnight Luxe comfort layers aim for a “soft hug with support,” using gel and SupremeSupoort memory foams to cradle hips and shoulders while keeping your spine aligned—ideal for side sleepers and those who move around at night.
The Plank Firm goes for “flat and firm,” with a low-loft quilted top and firm Supreme Response Foam that keeps you feeling on top of the bed. In short, the Helix Midnight Luxe offers pressure relief and contouring, while Plank Firm provides a firmer surface for back and stomach sleepers.
Support Layers
Helix Midnight Luxe
- Helix Responsive Foam
- ErgoAlign Layer
- Zoned Individually Wrapped Coils
- DuraDense Foam
Plank Firm
- High-Density Base Foam
The Helix Midnight Luxe and Plank Firm have different types of support. The Helix Midnight Luxe uses an optional ErgoAlign layer plus up to 1,000 zoned coils, giving reinforced hip support, strong edges, and spine alignment—great for reducing lower-back strain.
The Plank Firm relies on the high-density foam base, keeping the surface flat and firm. It offers firm support but lacks the zoned pushback and contouring of Helix’s coil system, making it better for those who prefer sleeping “on top” of the bed.
Quality
Both mattresses use quality materials. The Helix Midnight Luxe focuses on plush comfort plus targeted support, with premium memory foams and zoned lumbar coils that cradle hips and shoulders while keeping your spine aligned. Its foams are GREENGUARD Gold and CertiPUR-US certified, and RTINGS notes good-density layers for durability, though the quilted top is softer.
The Plank Firm keeps it simple and dense, with thick high-density base foam, firm comfort layers, and a flippable design, delivering flat, firm support for back and stomach sleepers. Value comes from matching materials to your sleep style.
Certifications
Both the Helix Midnight Luxe and Plank Firm use CertiPUR-US and GREENGUARD Gold certifications to show their foams meet standards for lower chemical emissions and safer materials. This doesn’t change firmness or pressure relief, but it helps reduce off-gassing smells.
The sleep benefit still comes from choosing the feel that suits you. The Helix Midnight Luxe for pressure-relieving hybrid comfort, while Plank Firm for firm and a flippable feature.
Helix Midnight Luxe vs Plank Firm: Comfort Features
The Helix Midnight Luxe and Plank Firm both aim to improve sleep. The Helix Midnight Luxe is a medium hybrid with a quilted pillow top, zoned lumbar support, and optional cooling covers, offering medium to medium-firm comfort with a gentle foam hug, ideal for side sleepers or those needing pressure relief.
The Plank Firm is an all-foam, flippable mattress with Firm and Extra Firm sides, keeping you flat and supported, which helps back and stomach sleepers who struggle with sinking hips. Overall, the Helix Midnight Luxe focuses on cushioning plus support, while Plank Firm prioritizes firm, stable alignment.

Overall Performance
The Helix Midnight Luxe and Plank Firm target different sleep needs. The Helix Midnight Luxe cradles hips and shoulders while providing zoned lumbar support, making it ideal for side and combination sleepers who need pressure relief without sinking too far.
The Plank Firm is very firm (flippable between firm and ultra-firm sides) which helps back and stomach sleepers stay aligned and limit hip sink. The Helix Midnight Luxe may feel too soft for strict firm sleepers, while the Plank Firm can create pressure points for sensitive side sleepers, reducing restorative sleep.
Firmness and Feel
- Helix Midnight Luxe: Medium (6 out of 10)
- Plank Firm: Firm (8 out of 10) and Extra Firm (10 out of 10)
The Helix Midnight Luxe and Plank Firm have different firmness profiles. The Helix Midnight Luxe feels medium (around 6/10), offering a gentle “hug” that cradles hips and shoulders while keeping your spine aligned with zoned lumbar support. This is ideal for side and combination sleepers who need pressure relief.
The Plank Firm is flippable, with a firm side (8/10) and ultra-firm side (10/10), keeping you “on top” of the bed with minimal sink, which suits back and stomach sleepers or anyone who prefers a very firm, stable surface.
Sinkage
The Helix Midnight Luxe and Plank Firm differ in sinkage. The Helix Midnight Luxe allows moderate, controlled sink, giving a gentle “hug” for shoulders and hips while keeping your spine aligned. This is great for side and combination sleepers needing pressure relief.
The Plank Firm is built for a minimal sink, with a zero-loft top and thick high-density foam that keeps you flat and supported, ideal for back and stomach sleepers or firm-lovers. Helix adds cushioning and reduces tossing from pressure points, while Plank keeps alignment and mobility; choosing the right sink depends on your sleep position and comfort needs.
Pressure Relief
The Helix Midnight Luxe excels at pressure relief, using premium memory foams to cradle hips and shoulders while zoned lumbar support keeps your spine aligned, ideal for side sleepers.
The Plank Firm focuses on a firm and minimal-loft support, keeping you flat and lifted. Its dense foams can soothe hips and shoulders for the right sleeper, but it doesn’t provide the same contouring or “hug” as the Helix Midnight Luxe. Overall, Helix prioritizes cushioning and controlled sink, while Plank prioritizes firm alignment and minimal hip dip.
Helix Midnight Luxe vs Plank Firm – Support Features
The Helix Midnight Luxe and Plank Firm both focus on support. The Helix Midnight Luxe is a hybrid with up to 1,000 zoned coils, reinforced hip support, and optional ErgoAlign foam. It’s balanced, keeps your spine alignment, and provides strong edge support.
The Plank Firm is an all-foam, flippable mattress with a thick, high-density base and zero- or minimal-loft sides, keeping you flat and stable, ideal for back and stomach sleepers.

Overall Performance
The Helix Midnight Luxe and Plank Firm both provide strong support. The Helix Midnight Luxe uses up to 1,000 zoned coils plus optional ErgoAlign foam, keeping hips lifted while letting shoulders sink slightly. This is best for side and combination sleepers who need pressure relief and spine alignment.
The Plank Firm relies on a thick, high-density base and flippable firm/extra-firm sides, keeping you flat and lifted, which suits back and stomach sleepers or anyone who struggles with hip sinks. Side sleepers may find the Plank too hard, while strict firm sleepers may find the Helix Midnight Luxe too soft.
Support Layers
Helix Midnight Luxe
- Helix Responsive Foam
- ErgoAlign Layer
- Zoned Individually Wrapped Coils
- DuraDense Foam
Plank Firm
- High-Density Base Foam
The Helix Midnight Luxe and Plank Firm both aim to keep your body aligned. The Helix Midnight Luxe uses zoned coils plus an optional ErgoAlign foam layer to lift heavier areas, promoting spinal alignment and reducing tossing or stiffness.
The Plank Firm relies on a thick high-density foam base and a minimal- or zero-loft surface to keep you flat and “on top” of the bed, helping back and stomach sleepers avoid hip sink and maintain steady posture throughout the night.
Response Time
The Helix Midnight Luxe is slightly faster to bounce back than the Plank Firm, giving it a touch more “spring” when you move. That means you’ll feel less stuck and can change positions more easily, which is helpful for combo sleepers or anyone who wants easier in-and-out-of-bed movement.
The Plank Firm is still responsive but feels steadier and more planted, which works if you prefer a firm, stable surface. A faster response favors mobility and comfort for shifting sleepers, while a slower response favors a calm and grounded feel.
Bounce
The Helix Midnight Luxe has more bounce thanks to up to 1,000 individually wrapped coils and responsive foam layers, giving a gentle lift that makes switching positions and getting in or out of bed easier.
The Plank Firm, with its all-foam, high-density base and low-loft quilted top, feels much flatter and steadier, offering firm, stable support with minimal spring. Overall, choosing the Helix Midnight Luxe for a bit of bounce and easier movement, or the Plank Firm for a very firm and stable sleep surface.
Helix Midnight Luxe vs Plank Firm- Cooling Features
Both mattresses offer cooling; the Helix Midnight Luxe focuses on surface comfort, letting you choose breathable TENCEL or a GlacioTex cover for a cool-to-the-touch feel without changing its plush comfort.
The Plank Firm prioritizes airflow with breathable quilted tops and open-cell foams to prevent heat buildup, plus an optional GlacioTex cover for instant cooling. In short, Helix suits hot sleepers who want softness, while Plank is better for those who want a firm and cooler sleep.

Overall Performance
Both mattresses help reduce overheating; the Helix Midnight Luxe cools mainly at the surface, offering breathable TENCEL or a GlacioTex cover for a cooler feel.
The Plank Firm focuses on airflow throughout the mattress, using breathable quilting and open-cell foams to prevent heat buildup, plus an optional GlacioTex cover for instant cooling. These features are best for hot sleepers or those with night sweats, but less useful for people who naturally sleep cold or prefer a warmer bed.
Cooling Layers
Helix Midnight Luxe
- Plush Pillow Top
- Breathable TENCEL Cover or GlacioTex Cooling Cover
- Gel Memory Foam
- CoolForce Layer
Plank Firm
- GlacioTex Cooling Cover
The Helix Midnight Luxe has a more layered cooling design, combining a breathable cover (TENCEL or GlacioTex) with gel memory foam and a CoolForce layer, so cooling happens both at the surface and within the foam. It shows moderate heat buildup with cooldown.
The Plank Firm relies more on its GlacioTex cover for a cool-to-the-touch feel rather than multiple cooling foams, but it releases heat quickly once you move. Overall, Helix offers deeper, built-in cooling, while Plank delivers fast surface relief.
Breathability
Both mattresses are designed to sleep cooler; the Helix Midnight Luxe emphasizes airflow by pairing a breathable TENCEL or cool-to-the-touch GlacioTex cover with a coil support system, which naturally allows more air to move through the mattress.
The Plank Firm focuses on foam ventilation instead, using breathable quilted tops and open-cell foams to limit heat buildup, with an optional GlacioTex cover for instant cooling. Choose Helix for airflow and plush comfort, or Plank for firm, foam-based cooling.
Temperature Regulation
Both mattresses regulate temperature well. The Helix Midnight Luxe uses multiple cooling elements—breathable covers, cooling foams, and a coil core—to deliver a consistently cooler feel, especially for sleepers who want plush comfort without overheating. It shows a strong cooling and steady cooldown.
The Plank Firm takes a simpler approach with breathable quilted tops, open-cell foams, and an optional GlacioTex cover. While firmer and all-foam, it cools quickly once pressure is removed, making it an excellent option for hot sleepers who prefer firmness.
Helix Midnight Luxe vs Plank Firm – Sleeping Positions
The Helix Midnight Luxe is ideal for side and combination sleepers because it cushions pressure points like the shoulders and hips while keeping the spine properly aligned with zoned support. This helps reduce soreness and improve comfort overnight.
The Plank Firm is better for back and stomach sleepers who prefer a very firm feel, as it keeps the body flat and supported to prevent hip sink. Its flippable design lets firm-sleep lovers choose the level of support that feels best.

Side Sleepers
- Helix Midnight Luxe: Excellent
- Plank Firm: Average
The Helix Midnight Luxe is excellent for side sleeping because it’s made to cushion the shoulders and hips while still supporting the waist. Its pressure-relieving foams and zoned lumbar support help keep the spine aligned.
The Plank Firm is more average for side sleeping because its firm and extra-firm feel leaves very little “give.” While great for people who love a flat surface, many side sleepers may feel shoulder or hip pressure instead of relief.
Back Sleepers
- Helix Midnight Luxe: Excellent
- Plank Firm: Excellent
Both mattresses are excellent for back sleeping. The Helix Midnight Luxe supports the spine with a balance of pressure relief and zoned lumbar support, helping the lower back stay aligned without feeling too hard.
The Plank Firm is great at keeping the body very flat and lifted—especially on the extra-firm side—so hips don’t sink, and the back stays neutral. In short, Helix offers supportive comfort, while Plank delivers firm alignment.
Stomach Sleepers
- Helix Midnight Luxe: Average
- Plank Firm: Excellent
The Helix Midnight Luxe is average for stomach sleeping because its medium-plush, pressure-relieving design allows more sink than most stomach sleepers need, which can let the hips dip and strain the lower back.
The Plank Firm, on the other hand, is excellent for stomach sleeping thanks to its firm and flat feel that keeps the midsection lifted and the spine neutral. In short, Helix favors comfort, while Plank delivers the firm support stomach sleepers typically need.
Max. Weight
The Plank Firm supports a higher maximum weight than the Helix Midnight Luxe, which is great for long-term support and durability. Helix states its standard Luxe models are designed for up to 600 lbs total (300 lbs per sleeper), and exceeding that can lead to extra sink and faster wear. Brooklyn Bedding rates the Plank Firm for up to 950 lbs, helping it maintain a firm, flat feel for more body types—especially couples. Both brands recommend specialized models (Helix Plus or Titan) for sleepers over 300 lbs.
Heavy Sleepers
For heavy sleepers, these mattresses perform differently due to weight limits and support goals. The Helix Midnight Luxe supports up to 300 lbs per sleeper (600 lbs total) and works best for side sleepers, but heavier back or stomach sleepers may notice less spinal support. Helix recommends Helix Plus/Plus Luxe for sleepers up to 500 lbs per person.
The Plank Firm is very firm to extra-firm and can support up to 950 lbs total, making it better for heavier back and stomach sleepers. For those well over 300 lbs or concerned about long-term firmness, Brooklyn Bedding’s Titan line is a safer option.
Helix Midnight Luxe vs Plank Firm – Couples Suitability
The Helix Midnight Luxe is very couples-friendly thanks to excellent motion isolation, strong edge support, and a medium feel that balances comfort and support for different preferences. This means fewer wake-ups and more usable mattress space, especially for light sleepers or those sharing a queen.
The Plank Firm can also work for couples, especially those who prefer a very firm bed, thanks to its flippable design, strong edge support, and high weight capacity. However, the motion transfer is less isolating, so light sleepers may notice a partner’s movements. It’s ideal for couples who prioritize firmness and stability over minimal motion.

Edge Support
- Helix Midnight Luxe: Excellent
- Plank Firm: Excellent
Both mattresses offer strong edge support. The Helix Midnight Luxe uses reinforced support under the hips and advanced lumbar and edge support. The Plank Firm is naturally flat and firm. It’s slightly more than Helix, but still excellent for lying or sitting near the edge. Helix feels a bit firmer when sitting, while Plank excels at keeping the sleeping surface flat.
Motion Isolation
- Helix Midnight Luxe: Excellent
- Plank Firm: Excellent
Both mattresses are excellent for motion isolation, but the Helix Midnight Luxe is usually the better choice for light sleepers. It’s softer foams and individually wrapped coils that absorb motion. The Plank Firm also performs well, but its firm surface spreads some movement more, so shifts can be slightly more noticeable for light sleepers.
Sex
- Helix Midnight Luxe: Excellent
- Plank Firm: Excellent
Both mattresses rate excellent for intimacy, the Helix Midnight Luxe provides a stable, secure surface with great edge support and minimal sitting sinkage, making it great for using the full bed even if its bounce is slightly lower.
The Plank Firm offers a firmer, fast-responding surface with higher bounce and strong edge support, giving a flatter, “on top” feel that can make repositioning easier. Helix favors stability, while Plank favors responsiveness.
Dual Firmness
The Plank Firm has dual firmness—it’s flippable, with Firm on one side and Extra Firm on the other. This is great if you’re unsure about firmness or want a built-in backup without changing mattresses. The Helix Midnight Luxe, in contrast, only comes in a single medium-plush feel, so couples with different preferences need a Split King setup or a dual-feel topper to adjust firmness.
While Helix focuses on a balanced, pressure-relieving feel, it doesn’t offer the same flexible, flippable option that Plank provides for changing needs over time.
California King
For a California King, both the Helix Midnight Luxe and the Plank Firm come as a single 72″ × 84″ mattress, so you get a wide sleep surface that’s great for stretching out, cuddling, or sprawling without bumping into each other.
Helix works with that big surface by letting you fine‑tune feel with a dual‑feel topper if you need more personalized comfort, while Plank’s flippable Firm/Extra Firm design gives built‑in firmness options without changing beds, all while you enjoy the full open space of a Cal King.
Helix Midnight Luxe vs Plank Firm – Shipping
Both Helix Midnight Luxe and Plank Firm offer hassle-free shipping. Helix offers free shipping to the contiguous U.S., usually arriving in 6–10 business days for Luxe models, and you can pay extra for in-home setup and old mattress removal. This is perfect if you want a completely hands-off experience.
Plank Firm, from Brooklyn Bedding, also ships free via FedEx Ground within the contiguous U.S., usually in 5–7 business days. It’s simple and budget-friendly if you’re okay setting it up yourself, though extra fees apply for Alaska and Hawaii.
Helix Midnight Luxe vs Plank Firm – Unboxing
Both mattresses come compressed in a box, so unboxing is pretty similar: bring the box to your bedroom, place the rolled mattress on your foundation, cut the plastic, and let it expand. Plank has a quick decompression, with most of it happening fast and finishing within about 24 hours.
Helix Luxe follows the same “bed-in-a-box” approach, but the big difference is optional help. Helix offers In-Home Setup & Removal, where a team sets up the mattress, removes packaging, and can take away your old mattress. Plank expects a DIY setup.
Helix Midnight Luxe vs Plank Firm – Off-Gassing
When it comes to off-gassing, Plank Firm clears the “new mattress” smell faster, while Helix Midnight Luxe starts milder but lingers longer.
Helix had a moderate initial smell and took about 7 days to fully air out, while Plank’s stronger initial odor disappeared in roughly 3 days. Faster off-gassing means you can sleep comfortably sooner and aren’t bothered by lingering smells. Both mattresses use CertiPUR-US foams and have GREENGUARD Gold certification.
Helix Midnight Luxe vs Plank Firm –Trial Period
Both Helix Midnight Luxe and Plank Firm come with a 120-night at-home trial, with a required 30-night break-in period so your body can adjust. The Helix offers free returns with pickup arranged, making it truly low-risk if the mattress isn’t right for you. Plank also accepts returns during the trial, but charges a $99 return fee, so it’s still protective but slightly less worry-free than Helix’s option.
Helix Midnight Luxe vs Plank Firm – Warranty
Both Helix Midnight Luxe and Plank Firm come with warranties that cover manufacturing defects and sagging, which is important because dips can affect spinal alignment and sleep quality. Helix offers a Limited Lifetime Warranty, then prorated afterward, with a 1.5-inch visible indentation threshold and rules like using proper support and keeping the cover intact.
Plank Firm has similar protections—covering defects and impressions over 1.5 inches, with guidelines like avoiding stains and not removing the cover. Both give early coverage to protect against premature sagging.
Helix Midnight Luxe vs Plank Firm – Price
For a Queen, Helix Midnight Luxe is pricier than Plank Firm since it’s a more premium hybrid. Helix lists the Queen at $1,799 with a 25% discount, while Plank Firm shows $1,332 with a discount.
The price difference matters depending on what you want: Helix is ideal if you’re after a luxury, hotel-like feel with plush top layers and hybrid support. Plank is a strong value—well-built, firm, and even reversible with two firmness levels—so it’s great if you want solid support without paying extra for luxury features.
Helix Midnight Luxe vs Plank Firm – Company
Helix Midnight Luxe comes from Helix Sleep, a well-known online brand that focuses on matching mattresses to sleepers’ needs and backs it up with a long trial and lifetime-style warranty. This is really helpful if you’re buying without testing in a store.
Plank Firm is made by Brooklyn Bedding, known for factory-direct quality and firm mattresses. Both brands are part of the larger 3Z Brands family, which can give extra confidence thanks to more resources for manufacturing, customer service, and long-term support.
Helix Midnight Luxe vs Plank Firm – Customer Support
Both brands offer the usual ways to get help—phone, chat, and email. Helix provides live chat from 10 am–10 pm ET every day, plus email, phone, and even text support. Plank Firm also has chat and email, with phone support from 11 am–8 pm ET on weekdays and 11:30 am–8 pm ET on weekends, though lines can be busy or closed on major holidays.
Strong customer support matters because it makes online mattress buying less stressful, helping with orders, delivery, trial questions, returns, and warranty issues.
Helix Midnight Luxe vs Plank Firm: Assessment
If you’re choosing between Helix Midnight Luxe and Plank Firm, it comes down to feel and firmness. Helix Midnight Luxe is a medium and a pillow-top hybrid—soft on top but supportive underneath—making it great for side and combination sleepers who want pressure relief, strong edges, and optional cooling covers.
Plank Firm is firm and flippable, perfect for back or stomach sleepers or anyone who likes a flat and supportive bed with a cooler GlacioTex cover option. Both offer a 120-night trial, a limited lifetime warranty, and standard support channels, though Helix has longer chat hours and text support, while Plank’s phone hours are more limited.
Which of These Mattresses Do We Recommend For You?
Picking a mattress is dependent on your sleep style. Helix Midnight Luxe is best for side or combination sleepers who want a medium feel, pressure relief at shoulders and hips, and zoned support for spinal alignment.
Plank Firm suits back sleepers, stomach sleepers, or anyone who loves firm or extra-firm beds with minimal sink and a flippable design to test firmness. Avoid Helix if you need firm support, and skip Plank if you’re a sensitive side sleeper. Consider your firmness preference, pressure points, partner needs, cooling options, trial and warranty rules, and a good foundation to get the best fit.
Our Favorite Things About These Mattress
- Helix Midnight Luxe: You’ll love its deep pressure relief, plush pillow-top feel, and zoning that keeps your spine aligned.
- Plank Firm: Two firmness levels, so you can switch without buying a new mattress.
- Shared Strength: Offers a GlacioTex cooling cover option for a cooler-to-the-touch surface
What We Didn’t Like About These Mattresses
- Helix Midnight Luxe: It’s pricier than most hybrids, and its plush, contouring feel may feel too soft or enveloping for stomach sleepers or anyone who prefers a firmer, bouncier surface.
- Plank Firm: It can feel too firm, which is not suitable for side sleepers.
Helix Midnight Luxe
Helix Midnight Luxe
Plank Firm
Plank Firm
Frequently Asked Questions
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Helix Midnight Luxe vs Plank Firm – Social Proof
When it comes to social proof, Helix Midnight Luxe shows a bigger crowd, while Plank Firm highlights a more niche user base.
Helix has more press features, awards, and high-volume customer feedback with 55,000+ verified reviews plus mentions from Wired, Good Housekeeping, Oprah, and Time. It also has third-party testing from Tom’s Guide, RTINGS, and Sleepopolis, which helps you predict feel, pressure relief, motion isolation, and cooling.
Plank Firm’s social proof is more on a firm feel, with endorsements from the American Chiropractic Association and quotes from outlets like Tuck Sleep and Sleep Advisor. Expert coverage from Tom’s Guide, Sleep Foundation, and NapLab backs its two-sided firm/extra-firm design, helping you pick a mattress that really delivers on firm support.