We track the Queen 12-inch SweetNight CoolNest memory-foam mattress.
Pick one or more traits above and we will show the strengths and watch-outs that matter for this mattress.
Choose the SweetNight CoolNest if you want a low-priced memory-foam mattress with better motion isolation than most budget beds and enough cooling features for many warm sleepers. Skip it if you need coil bounce, reinforced hybrid edges, or a simpler return process.
Pressure maps showed side-sleeper average/maximum pressure of 0.137–0.143/0.91–0.95 PSI, back pressure of 0.069–0.071/0.47–0.49 PSI, and stomach pressure of 0.078–0.082/0.95–0.99 PSI. Sinkage measured a moderate 2.08–2.16 inches, with a 5.0-inch comfort system on a 15.5-inch profile. The tested mattress appears closer to the 16-inch build than the 12-inch value model.
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 | 0.137–0.143 PSI | 0.91–0.95 PSI |
| Back | 0.069–0.071 PSI | 0.47–0.49 PSI |
| Stomach | 0.078–0.082 PSI | 0.95–0.99 PSI |
These PSI ranges are measured values. Map colors show where pressure collected, not the PSI of each square.
Sinkage measured a moderate 2.08–2.16 inches on a 15.5-inch profile. The 5-zone support foam maintained strong alignment in back and side testing, but support depth changes across the 12-, 14-, and 16-inch models.
Peak-to-peak acceleration measured 6.65–6.93 m/s^2. The surface mostly recovered in 0.196–0.204 seconds, fully recovered in 0.59–0.61 seconds, and produced 7.11–7.41 inches of bounce. Partner movement stays exceptionally well controlled even though the surface recovers quickly.
A fixed 12 lb load creates the impact while an accelerometer records the movement that crosses the mattress.
Sinkage measured 2.08–2.16 inches, and the construction uses PCMflux foam, gel memory foam, and a breathable cover. Testing showed strong all-foam temperature control, but the mattress does not provide coil airflow or active cooling.
Sitting-edge compression measured 3.92–4.08 inches, and lying-edge support was good. The perimeter is strong for an all-foam mattress, though it lacks the reinforced coils used by edge-focused hybrids.
We measure seated compression, then check how secure the surface remains while lying directly along the edge.
The surface mostly recovered in 0.196–0.204 seconds and fully recovered in 0.59–0.61 seconds. Moderate sinkage and low bounce make movement exceptionally quick but controlled rather than springy.
The thick all-foam profile and five-inch comfort system are encouraging. Undisclosed foam densities leave the long-term resilience of the comfort layers less clear than their depth alone would suggest.
The score uses the policy terms shown in the Fine Print Check below. Models governed by the same terms use the same policy inputs.
CoolNest system feels up to 8 degrees cooler.
Supported directionally by PCM, gel foam, and good measured cooling, but the mattress is still all foam and not an active-cooling bed.
Good budget cooling story; very hot sleepers should compare coil or active-cooling models.
5-zone support system helps relieve pressure points.
Supported by the current construction details.
Adds structure for back and combination sleepers without changing this into a firm mattress.
CoolNest is positioned for couples and light sleepers.
Testing showed excellent motion isolation and fast response.
This is one of the clearest reasons to choose it over many budget foam beds.
CoolNest is positioned as a strong cooling foam value under $500.
Supported for the checked 12-inch Queen sale price, but prices vary by height and retailer.
Good current value when the direct-site Queen is near $400; more price history is needed.
The mattress has a 100-night risk-free trial.
Mixed. Official support pages add a 21-night minimum, solution-first refund language, and marketplace exclusions.
Read the direct-site return steps before buying, especially if return ease is a top concern.
Reddit shopper threadsProduct-specific CoolNest discussion is too limited to establish broad comfort or durability patterns. The available threads mainly help explain marketplace availability and concerns about SweetNight's return process.
Wayfair gives product-specific retailer context for the CoolNest family, including listing facts, aggregate rating context, and marketplace return terms. It does not provide enough product-specific detail for broader comfort or durability conclusions.
SweetNight's official pages confirm the direct product page, current model facts, pricing, materials, height options, trial timing, refund flow, marketplace caveats, and warranty terms. Customer comfort and durability are assessed separately from brand claims.
Amazon listingAmazon provides marketplace context for the 14-inch Queen CoolNest, including price, availability, seller/shipper, rating count, and different return terms. It does not provide enough detail for broader comfort or durability conclusions.
Product-specific CoolNest discussion is too limited to establish broad comfort or durability patterns. The available threads mainly help explain marketplace availability and concerns about SweetNight's return process.
Budget bed-in-a-box shopper asked about CoolNest after seeing mixed SweetNight comments; no owner performance follow-up was posted.
Chronic-pain shopper listed SweetNight CoolNest among four mattresses tried, then said they kept Nectar Ultra; this is one limited context mention, not a broad fit signal.
Short CoolNest mention noting SweetNight direct and Wayfair purchase channels.
Shopper comparison mentions CoolNest as a cooling-focused Amazon option and provides useful context about where shoppers encounter it alongside other boxed mattresses.
SweetNight service-policy caution relevant to CoolNest shoppers because return and trial terms affect direct-purchase expectations.
Wayfair gives product-specific retailer context for the CoolNest family, including listing facts, aggregate rating context, and marketplace return terms. It does not provide enough product-specific detail for broader comfort or durability conclusions.
Product-specific retailer listing, aggregate rating context, and marketplace policy context.
SweetNight's official pages confirm the direct product page, current model facts, pricing, materials, height options, trial timing, refund flow, marketplace caveats, and warranty terms. Customer comfort and durability are assessed separately from brand claims.
Lists current price, variants, materials, claims, shipping, trial, and warranty badges.
Confirms the 100-day trial begins on delivery and has a 21-day minimum before return requests.
Confirms SweetNight may offer solutions before issuing a full mattress refund.
Amazon provides marketplace context for the 14-inch Queen CoolNest, including price, availability, seller/shipper, rating count, and different return terms. It does not provide enough detail for broader comfort or durability conclusions.
Product-specific marketplace listing for Amazon price, availability, seller/shipper, and return-context comparison.
SweetNight's support policy says the 100-day trial begins on delivery and requires a 21-day minimum before initiating a mattress return.
The trial is useful, but it is not an immediate-return policy.
SweetNight says mattresses bought from sweetnight.com or sweetnight.uk can be returned free of charge within the 100-day trial.
Marketplace purchases have different return rules.
Refund policy says SweetNight may offer solutions first, and a full refund follows if those solutions fail.
This makes the return process less simple than the headline trial language.
Amazon, Walmart, eBay, and other channels follow the seller or platform policy.
The official SweetNight trial should not be assumed for every retailer purchase.
SweetNight lists a 10-year limited warranty with proof, warranty-card, order, and issue-photo requirements.
The warranty is standard for this price tier but excludes subjective comfort and normal softening.
Model checkedJul 6, 2026Current model
Configuration testedAll-foam · 16-inch nominal profile · 15.5-inch measured profile
Price checkedJul 21, 2026
3D Weaving CoolNest Cover3D woven cooling cover · Top
The breathable CoolNest cover uses micro-venting. 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 SweetNight CoolNest Memory Foam Mattress, testing showed strong cooling for a foam mattress. Treat the cover as one part of thermal comfort rather than proof that the mattress will stay cool for every sleeper.
PCMflux High Resilience FoamPCM-infused high-resilience foam · Comfort
This layer is part of the cooling system. 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 SweetNight CoolNest Memory Foam Mattress as a whole, testing showed moderate sinkage and a 5-inch comfort layer on the measured profile. Near the surface it contributes more cushioning; deeper in the mattress it primarily moderates the transition into the support core.
Gel-infused Memory FoamGel-infused memory foam · Comfort
Adds contouring and heat-dissipation support. Memory foam conforms under sustained load, spreading pressure over a larger contact area. Its thickness and position influence contour depth and how quickly the sleeper reaches firmer layers below.
Why it matters: In the finished SweetNight CoolNest Memory Foam Mattress, testing showed moderate sinkage and a 5-inch comfort layer on the measured profile. This is one of the layers most responsible for shoulder and hip cushioning; sleepers who dislike a close contour should compare it with the mattress’s recorded sinkage and recovery.
Ocean Memory FoamMemory foam · Comfort
Listed on the official materials section; exact layer thickness is not provided. Memory foam conforms under sustained load, spreading pressure over a larger contact area. Its thickness and position influence contour depth and how quickly the sleeper reaches firmer layers below.
Why it matters: Across the SweetNight CoolNest Memory Foam Mattress, testing showed moderate sinkage and a 5-inch comfort layer on the measured profile. This is one of the layers most responsible for shoulder and hip cushioning; sleepers who dislike a close contour should compare it with the mattress’s recorded sinkage and recovery.
Transition Comfort FoamComfort transition foam · Transition
Bridges the comfort foams and zoned support foam. This layer buffers the sleeper from the firmer support core and controls how gradually resistance increases as the body sinks deeper.
Why it matters: For the SweetNight CoolNest Memory Foam Mattress as a whole, the support foam uses a 5-zone layout with 9 comfort bars. It becomes especially important for higher-weight sleepers and back or stomach sleepers, who engage more of the mattress depth than lighter sleepers.
5-Zone Support FoamZoned support foam with 9 comfort bars · Base
The support foam uses a 5-zone layout designed to relieve pressure points. 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: In the finished SweetNight CoolNest Memory Foam Mattress, the layered construction avoids an unusually thin comfort system over the support core. Its thickness and material quality are more relevant to long-term shape retention and bottoming-out resistance than to surface softness.
Budget cooling memory foam: You want SweetNight's lower-priced cooling foam mattress with strong motion isolation.
Choose if: You want a cheaper memory-foam mattress for a guest room or strict budget.
Watch out: It has weaker edge support and fewer cooling features.
Read reviewChoose if: You want a longer trial and a flippable foam mattress with two firmnesses.
Watch out: It costs more than CoolNest and has a different feel.
Read reviewChoose if: You want a budget-friendly mattress with stronger edge support.
Watch out: It has a different feel and its current price should be checked before buying.
Read review