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Pick one or more traits above and we will show the strengths and watch-outs that matter for this mattress.
Choose Helix Sunset if you are a side sleeper who wants the soft Helix feel at the Core price. Skip it if you need firmer lumbar support, sleep on your stomach, share a bed with a very motion-sensitive partner, or want stronger edge support.
Pressure maps showed side 0.108–0.112/0.63–0.65 PSI, back 0.069–0.071/0.65–0.67 PSI, and stomach 0.078–0.082/0.55–0.57 PSI, with sinkage 2.98–3.10″ and comfort material around 4.5″. The deep cradle distributes pressure exceptionally well for side sleepers, but it can let the hips settle too far when a sleeper needs flatter support.
Repeated readings can vary by about 2%, so we report the full measured range instead of a single value.
| Position | Sustained pressure after the tester settles. The range shows the small variation across repeated readings. | The brief highest pressure at first contact. The range shows the small variation across repeated readings. |
|---|---|---|
| Side | 0.108–0.112 PSI | 0.63–0.65 PSI |
| Back | 0.069–0.071 PSI | 0.65–0.67 PSI |
| Stomach | 0.078–0.082 PSI | 0.55–0.57 PSI |
These PSI ranges are measured values. Map colors show where pressure collected, not the PSI of each square.
Sinkage measured 2.98–3.10″, and the wrapped-coil core keeps the plush surface stable enough for its intended side-sleeper fit. That unusually deep cradle can let the hips settle too far when a sleeper needs flatter support, so most stomach sleepers and support-focused back sleepers will need a firmer profile.
Motion-transfer testing scored 8.6/10 with peak-to-peak acceleration around 8.34–8.68 m/s². The comfort layers limited most partner movement, although the measured transfer was more noticeable than on Sunset Luxe.
A fixed 12 lb load creates the impact while an accelerometer records the movement that crosses the mattress.
Cooling testing scored about 9.6/10, sinkage measured 2.98–3.10″, and the Core construction allows airflow through wrapped coils. Heat dispersed efficiently even with substantial body contact, while the optional GlacioTex cover adds a cooler initial touch than the standard knit surface.
Edge-support testing scored 8/10, sitting compression measured 4.41–4.59″, and lying edge support rated Good. The perimeter remains usable for most sleepers, but the soft comfort layers compress noticeably when seated and are less stable than the reinforced edge on Sunset Luxe.
We measure seated compression, then check how secure the surface remains while lying directly along the edge.
The surface mostly recovered in 0.39–0.41 seconds and fully recovered in 0.88–0.92 seconds, while bounce measured 9.11–9.49″ and sinkage measured 2.98–3.10″. The deep cradle is balanced by a quick foam response and lively coils, so most sleepers can turn over without feeling trapped.
The tested mattress measured around 12.5″ tall with about 4.5″ of comfort material over a wrapped-coil core. The build is credible for the Core tier, but limited current-generation owner history leaves more uncertainty about long-term softening than with better-established models.
The score uses the policy terms shown in the Fine Print Check below. Models governed by the same terms use the same policy inputs.
Helix positions the Sunset around side sleepers.
Testing and lineup context support that fit direction, but body weight and sleep position still matter.
Body weight, sleep position, and firmness preference still matter more than the model name.
Helix emphasizes airflow and optional cooling-cover upgrades across the current lineup.
Cooling testing produced an exceptional 9.6/10 result for this model.
Hot sleepers should price the specific cover/cooling configuration they plan to buy.
Core hybrid is positioned as the core Helix option.
The tier choice changes comfort depth, cooling options, price, and movement feel.
Compare adjacent Core, Luxe, and Elite models before paying for upgrades.
Reddit shopper threadsCore Sunset Reddit discussion is limited and mostly shopping-based. The main buyer takeaway is Sunset's softer side-sleeper positioning, with same-model owner reports still limited.
Helix lists Sunset positioning, options, pricing, trial terms, and warranty coverage. Comfort conclusions come from testing and owner feedback.
Core Sunset Reddit discussion is limited and mostly shopping-based. The main buyer takeaway is Sunset's softer side-sleeper positioning, with same-model owner reports still limited.
Sunset owner and shopping thread focused on soft feel and edge support.
Sunset comparison thread for soft Helix fit context.
Helix lists Sunset positioning, options, pricing, trial terms, and warranty coverage. Comfort conclusions come from testing and owner feedback.
Construction, firmness, size, and policy details for the Sunset.
Promotional price context; more price history is needed before judging deal frequency.
Helix gives mattresses a 120-night trial with a 30-night break-in period.
The 30-night break-in period delays when an eligible comfort return can begin.
Support language allows eligible returns but does not make repeat household returns/exchanges unlimited.
The policy is buyer-friendly, but serial exchanges are not an open-ended fit-testing strategy.
In-home setup and old-mattress-removal services can be non-refundable once completed.
The mattress return can be free while optional services still create sunk cost.
Model checkedJul 8, 2026Current model
Configuration testedCurrent model lineup · Soft
Price checkedJul 21, 2026
Breathe Knit or GlacioTex coverBreathe Knit or GlacioTex cover
The standard knit cover is breathable; GlacioTex is the cool-to-the-touch upgrade. As the surface textile, it chiefly affects the initial hand feel, moisture movement, and how readily heat leaves the sleeper; it supplies little of the mattress's deep support.
Why it matters: Across the Helix Sunset Mattress, cooling testing scored about 9.6/10. Treat the cover as one part of thermal comfort rather than proof that the mattress will stay cool for every sleeper.
comfort foamscomfort foams
Foam comfort layers add contouring and pressure relief above the coils. This foam distributes load through the comfort stack. Its position, thickness, and firmness matter more than a gel infusion or branded name alone when judging contour and support.
Why it matters: For the Helix Sunset Mattress as a whole, pressure maps showed side 0.11/0.64 PSI, back 0.07/0.66 PSI, and stomach 0.08/0.56 PSI. Near the surface it contributes more cushioning; deeper in the mattress it primarily moderates the transition into the support core.
wrapped coil support corewrapped coil support core
Individually wrapped coils provide support while allowing airflow. This is the mattress’s main load-bearing spring unit. Pocketed coils, when used here, compress more locally than connected springs while leaving open space for airflow and rebound.
Why it matters: In the finished Helix Sunset Mattress, sinkage measured around 3.04″. This layer supplies most of the deep pushback for alignment, but the foams or fibers above it still determine initial pressure relief and contour.
DuraDense baseDuraDense base
Dense base foam stabilizes the coil system. This foundation resists deep compression and keeps the comfort layers working on a stable plane; it is not intended to provide the mattress’s initial plushness.
Why it matters: Across the Helix Sunset Mattress, the wrapped-coil core gives this softer model a stronger durability base. Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Plush Core side-sleeper profile: You want a soft Core hybrid for side sleepers.
Choose if: You want more comfort depth without going all the way to Elite pricing.
Watch out: It may not have the same cooling or microcoil features as Elite.
Read reviewChoose if: You want the thickest, most premium version of this Helix feel.
Watch out: It costs much more and can feel less nimble than the Core model.
Read reviewChoose if: You want a more support-forward Helix feel.
Watch out: It changes the firmness and pressure-relief profile.
Read review