The Cocoon by Sealy Chill Mattress is always 35% off — here's why it's still the best cooling bed to buy in Labor Day sales

Cocoon by Sealy Chill mattress with Price Drop graphic overlaid

(Image credit: Sealy / Future)

Cocoon by Sealy's Chill Mattress is one of the most affordable cooling beds thanks to a great evergreen deal. The standard off means you can always save up to $490 on the Chill Memory Foam Mattress at Cocoon by Sealy, with a queen always sold at $699 (was $1,079).

So, why is this regular discount still the best deal you'll find this Labor Day? First of all, you'll find the Chill Mattress in this year's best mattress guide for all sleepers, thanks to its incredibly low price for a cooling, heat-dissipating mattress. Secondly, you'll find the permanent sale means you'll never have to worry that a better discount will come along after you buy.

There's also some pretty good extras, including free shipping, a 10-year warranty,100-night sleep trial, and a free bedding bundle. If you're a hot sleeper in need of a budget cooling bed right now, the Chill Mattress is the best bed discount you'll find ahead of the Labor Day mattress sales and deals.

This Emma mattress is ideal for side sleepers — and you can save $730 on it right now

Cocoon by Sealy Chill Memory Foam Mattress
Was: From $619
Now: From $399
Saving: up to $490 at Cocoon by Sealy

Summary: The Cocoon by Sealy mattress our best budget pick in our best cooling mattress guide. With a memory foam design and a medium-firm feel, it’s suitable for all sleep styles (especially stomach and back sleeping). Our testers for the Cocoon by Sealy Chill mattress review found the mattress to sleep impressively cool for an all-foam bed thanks to its heat-dissipating Phase Change Material cover. While it may no provide that signature 'hug' of memory foam, it still offers excellent pressure relief to side sleepers and motion isolation for couples. Be aware, however, that the edge support could be better

Price history: The DreamCloud is 50% off in every size throughout the year, after an extended 40% off holiday sale last year. That means you don’t need to be strategic about when you buy this luxe bed.

Benefits: 365-night trial | Lifetime warranty | Free shipping and returns

Do cooling mattresses work?

If you're wondering whether cooling mattresses really stop overheating and night sweats, you should know how cooling mattress work. Cooling mattresses can rely on different features to regulate temperature.

For example, the best hybrid mattresses usually use airflow systems such as coils and springs to keep sleepers cool. The best memory foam mattresses, on the other hand, with add cooling gel infusions to their foam to dissipate heat. More advanced or specialist cooling mattresses will also use cool-touch fabrics such as Phase Change Material or the trademarked GlacioTex to pull away body heat. The best smart beds also use advanced smart tech to adjust the mattress's temperature.

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Frances Daniels is a PPA-accredited journalist and Sleep Staff Writer at Tom's Guide with an MA in Magazine Journalism from Cardiff University. Her role includes covering mattress and sleep news and writing sleep product reviews and buyer's guides, including our Best Hybrid Mattress 2025 guide. She is hugely interested in the relationship between good sleep and overall health, interviewing a wide array of mattress and sleep experts to create well-informed articles about important topics such as nutrition, sleep disorders (from sleep apnea to night terrors), lucid dreaming, sleep hygiene, and mattress care. She is also our specialist on mattress toppers — producing mattress topper reviews and taking care of our Best Mattress Toppers 2025 guide — and takes the lead on all content related to fiberglass-free mattresses for a clean, non-toxic sleep. Outside of Tom's Guide, she has written for Ideal Home, Homes & Gardens, and Marie Claire.