Sweetnight CoolNest 14 Inch King Size Mattress, Cooling King Memory Foam Mattress for Cool Night Sleep, 5-Zone Ergo Support for…
Sweetnight
Best for
Best for back pain
Amazon rating
Amazon aggregate, one input among many in the Verdict Score
Current price
$549.99
Updated May 16, 2026 · 1 min read
Sources behind this verdict
10 reviewers weighted by source trust
The consensus
What reviewers found
Synthesized across the trust-weighted source mix below.
Across the reviewers we read, the Sweetnight CoolNest is positioned for sleepers who want firmer-than-average support with explicit zoned pressure relief. sleepopolis.com measured it at a 7 out of 10 on their firmness scale, slightly above the industry medium-firm baseline, which aligns with what back-pain sufferers and stomach sleepers typically seek. The 5-zone ergonomic foam construction is the specific feature most often cited.
What reviewers liked
- sleepopolis.com confirms a firmer-than-average 7/10 feel suited to back and stomach sleepers
- 5-zone foam construction targets lumbar support specifically
- Amazon's 4.6 average across ~880 reviews is the highest in this roundup
- CertiPUR-US and OEKO-TEX certified foams
Where it falls short
- naplab.com rates overall performance as below average for the category despite the price
- r/Mattress thread warns about friction redeeming the brand's 100-night trial directly
- Smaller review base than other picks limits long-term durability evidence
- Firmer feel will not suit side sleepers seeking plush pressure relief
Across the reviewers we read, the Sweetnight CoolNest is positioned for sleepers who want firmer-than-average support with explicit zoned pressure relief. sleepopolis.com measured it at a 7 out of 10 on their firmness scale, slightly above the industry medium-firm baseline, which aligns with what back-pain sufferers and stomach sleepers typically seek. The 5-zone ergonomic foam construction is the specific feature most often cited.
The high-trust signals diverge. naplab.com rated overall performance as below average for the category, putting weight on the price-to-performance tradeoff rather than the cooling marketing. r/Mattress community sentiment includes one notable warning thread about difficulty redeeming the 100-night trial through the brand directly, though Amazon's own return policy mitigates that risk for buyers who purchase there. Long-term owners on r/Mattress are generally positive once the break-in period passes.
Net of the conflicting signals, this is a defensible pick for back-pain shoppers who specifically want a firmer feel and zoned support, but not the right choice for plush-feel seekers or hot sleepers expecting hybrid-level cooling. Buy from a retailer with a reliable return policy.
- Highlight 1
- CoolNest System for a Cooler Night - The CoolNest 14-inch king size mattress features our innovative CoolNest System, combining PCM high-resilience foam with gel-infused memory foam for layered cooling comfort. This advanced system helps dissipate heat and maintain a cooler sleep surface throughout the night, creating a cooler and more comfortable sleep environment for hot sleepers.
- Highlight 2
- 5-Zone Support for Pressure Relief - Engineered with a 5-zone design, this king foam mattress integrates support foam and comfort foam to help cushion pressure areas from head to toe. It helps redistribute pressure while maintaining stability and balanced support for enhanced comfort. Recognized by the American Chiropractic Association (ACA), it's designed to promote a more restful sleep experience.
- Highlight 3
- Motion Isolation for Undisturbed Sleep - Constructed with multiple layers of memory foam, the CoolNest 14-inch king memory foam mattress helps absorb motion and reduce vibrations. Additionally, these layers work synergistically to minimize motion transfer, so you're less likely to be disturbed whether your partner shifts positions or gets up during the night. Wake up feeling more refreshed.
- Highlight 4
- Enhanced Breathability for Cooler Comfort - The CoolNest cover incorporates 3D-woven technology, featuring a ventilation pore design that improves breathability by 35% compared to standard fabrics. Also, the PCM high-resilience foam with a hollow structure promotes 3X airflow. Together, these features help to wick away moisture and adapt to body temperature for a cooler, drier sleep surface.
- Highlight 5
- Restful Sleep & King Size Mattress in a Box - The Sweetnight CoolNest gel-infused memory foam mattress features CertiPUR-US certified foams and an OEKO-TEX certified cover, which provides a comfortable sleep environment. The 14-inch king size mattress is compressed in a box for easy setup. Additionally, it comes with a 10-year protection. Please allow the Sweetnight mattress to fully expand for 72 hours.
It's a great mattress for the price but won't blow your mind with how great it is either. I'd still suggest it to anyone with a budget around $400.
Despite their website clearly advertising a 100-night risk-free trial with free returns, I was met with relentless resistance when I tried to ...
Trust tier reflects our editorial assessment of the source, not the individual quote. Hover for the rationale. See how we tier sources →
“SweetNight CoolNest Memory Foam Review - A Low” · Cost Mattress ...
If the consensus convinced you
Check current price on Amazon
Pricing and availability change frequently. Tap through to confirm before buying.