I Tested 5 “Cooling” Mattresses. Only One Effectively Prevented Night Sweats.
If you sleep hot, you’ve probably been burned before – by mattresses that promise cooling and deliver it for about an hour before you’re back to flipping pillows and kicking off covers. I know because I’ve been that person.
So I actually tested the most popular options side by side, tracking temperature, comfort, and consistency through the night. The results were pretty clear. Here’s what I found.
The Quick Verdict
Glacier Apex is the best mattress for hot sleepers, and it’s not particularly close. If you want to skip straight to why, learn more on their website.
If you want the full picture, including how the competition stacks up, keep reading:
#1 Glacier Apex – The One That Actually Works All Night
Best for: Hot sleepers who want consistent cooling without sacrificing comfort
Most cooling mattresses solve the first half of the night. Glacier Apex solves all of it.
The difference comes down to what’s inside. The copper-infused foam and advanced cooling cover don’t just create a cool surface, they actively regulate temperature as your body heats up throughout the night. In testing, it earned a 9/10 cooling score and NapLab certification, which matched exactly what I experienced firsthand: I didn’t wake up once to adjust.
The comfort is just as dialed in. The plush feel contours to your body without trapping heat (a tricky balance most mattresses fail at), and three firmness options mean it works whether you’re a side, back, or stomach sleeper.
Every other mattress on this list was compared to Glacier Apex. That should tell you something.
#2 Helix Midnight Luxe – Great Hybrid, But Falls Short Overnight
Best for: Support-first sleepers who run warm but not hot
Helix Midnight Luxe is a genuinely excellent mattress – just not quite in the same league for all-night cooling. Its Tencel cover, gel-infused foam, and pocketed coils create solid airflow, and surface temperature only rose about 4 degrees during testing, which is strong.
The problem is the second half of the night. Compared to Glacier Apex, there’s a noticeable uptick in warmth as hours pass. If you sleep mildly warm and prioritize structured support, Helix is worth considering. If you’re a true hot sleeper, you’ll likely feel the difference by morning.
#3 DreamCloud Classic Hybrid – Best Budget Option
Best for: Hot sleepers on a tighter budget
DreamCloud surprised me. Its gel-foam-over-coils construction manages heat better than the price suggests, and it even outperformed some pricier competitors in specific cooling tests. It sleeps firmer and more supportive – great for back and stomach sleepers, less ideal if you want that plush contouring feel.
It’s the best value option here. But if budget isn’t the deciding factor, Glacier Apex is worth the upgrade.
#4 Casper Snow Max – Impressive Start, Inconsistent Finish
Best for: Plush hybrid fans who don’t run extremely hot
Casper Snow Max is engineered for cooling – and early in the night, it shows. The proprietary heat-pulling technology and zoned hybrid construction create a genuinely cool, comfortable surface at bedtime.
But it doesn’t hold. As the night wore on, warmth crept back more than I expected for a mattress at this price point. It’s a quality bed with a great feel, but if sustained all-night cooling is your goal, it doesn’t quite deliver.
#5 Nectar Luxe Hybrid – Best Pressure Relief, Not the Best Cooling
Best for: Side sleepers who prioritize pressure relief over temperature
Nectar Luxe Hybrid earns its spot on comfort alone. The slow, deep-contouring feel is exceptional for side sleepers, and the gel layers do help, especially early in the night. But heat buildup becomes noticeable over time, and it doesn’t breathe as well as the other hybrids here.
If you sleep cool-to-warm and pressure relief is your top priority, Nectar is worth a look. But if you’re reading this because you wake up overheated, it’s probably not the right fit.
Why Glacier Apex Wins (And Why It Matters)
Cooling a mattress for the first hour is easy. Keeping it cool through 7-8 hours of sleep – while your body generates heat, the room warms up, and you move around – is a much harder problem to solve. Most mattresses don’t.
Glacier Apex does. The combination of copper-infused foam, an engineered cooling cover, and a plush-but-breathable feel creates a mattress that works the way a cooling mattress is supposed to: consistently, all night, every night.
It’s the only mattress I tested that I’d actually recommend to a hot sleeper without any caveats. If you want to give it a try, Glacier’s products are up to 65% off on their site.
The Bottom Line: Better Sleep Starts with Better Temperature Control
You don’t have to keep waking up at 3 a.m. overheated. The right mattress makes a real difference, but only if it’s actually built to sustain cooling through the night, not just at first touch.
Glacier Apex is that mattress. Everything else on this list is a compromise.