A cooling comforter that keeps working after you warm up.

A lot of cooling comforters only feel cold when you first get in. ThermaCool also has a fill that soaks up extra body heat as you warm up. And it comes with a free cooling sheet set.

4.9 from 57 reviews
NOWFree ThermaCool Sheet Set With Every Order (up to $180 value)
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The Dosaze ThermaCool Comforter folded to show both sides, labeled: cool-to-the-touch side, TENCEL™ Lyocell side, 30% phase-change fill

5 reasons our cooling comforter isn't like the rest

If you run hot, you know how it goes. The comforter feels nice and cool when you get into bed, and by 2 a.m. you've kicked it onto the floor. Here's what makes ThermaCool different, and what to check before you buy any cooling comforter.

Illustration of how the phase-change fill works: you get in and the cool-touch side feels cold; you warm up and the fill absorbs your heat; you cool down and it releases the heat back.

It keeps cooling after you warm up.

A cool-to-the-touch fabric feels great when you first slide into bed, but it soon warms up to your body temperature. ThermaCool's fill is 30% phase-change material, which soaks up extra heat as you warm up and lets it go again as you cool down. (It works a bit like an ice cube, which keeps soaking up heat while it melts.) So the cooling doesn't stop at the first touch.

Check any cooling comforter: does it say what keeps it cool once you've warmed it up, or only that it feels cool?
"I bought this because I sweat so much in my sleep and I was sick of waking up drenched in the middle of the night. This comforter has stopped that"
KARLIE S.H., verified buyer

Illustration. Phase-change fill composition per Dosaze product specifications.

3 ways to cool: a cool-touch side that feels cold when you get in, a phase-change cooling fill that soaks up your body heat, and a TENCEL™ Lyocell side that pulls sweat away. Who has all 3: Dosaze has all three; Rest Evercool and Buffy Breeze have the cool-touch and TENCEL™ sides; Slumber Cloud has the cool-touch side and a phase-change fill; Cozy Earth lists none.

One side feels cool. The other stays soft and dry.

One side is a smooth fabric that feels cold the moment you touch it. The other side is TENCEL™ Lyocell, a soft, breathable fabric that pulls sweat away from your skin. Add the phase-change cooling fill in between and you get all three ways to cool. We looked at four other popular cooling comforters, and none of them lists more than two.

Check any cooling comforter: does it tell you what's inside, or just say "cooling fabric"?
"My husband is a hot sleeper and I run cold. This blanker solved a huge problem for us! The blanket is cozy and actually cooling like it says it is."
Verified buyer

TENCEL™ is a trademark of Lenzing AG. Competitor features as listed on each brand's website, October 7, 2026.

Close-up of the Dosaze ThermaCool Comforter with its label and corner loops, labeled: machine wash, tumble dry, loops hold a duvet cover.

Toss it in the washer and dryer.

Some cooling comforters are spot clean or dry clean only, which gets old fast on something you sleep under every night. ThermaCool goes in your washer and dryer at home. Use it on its own or inside a duvet cover; it has loops to hold one in place.

Before you buy: read the care tag. Some cooling comforters say dry clean only.
"The comforter is cool to the touch and yet still plush and luxurious feeling to it. Have washed it multiple times and still feels like new"
Verified buyer
Side by side: a brand's word, “trust us, it cools,” next to the Dosaze ThermaCool Comforter, verified by an independent lab, with a TENCEL™ Lyocell side and a phase-change cooling fill.

You know exactly what's keeping you cool.

“Cooling” is printed on a lot of comforter packaging. What matters is what's doing the cooling. On ThermaCool, one side is TENCEL™ Lyocell, a soft, breathable fabric that pulls sweat away from your skin, and 30% of the fill is phase-change material, which soaks up your body heat as you warm up. Both are named right on the product page, so you know what you're paying for.

Check any cooling comforter: look for named materials, not just the word “cooling.”
"This is exactly what I was looking for. I’ve always been a warm person and I love to be cold."
Jessica C., verified buyer

TENCEL™ is a trademark of Lenzing AG. Fill and fabric composition per Dosaze product specifications.

The ThermaCool comforter plus a free ThermaCool sheet set. Dosaze: comforter plus free sheet set, $200. Slumber Cloud or Cozy Earth: comforter only, $299 to $388. Queen, regular prices as of October 7, 2026.

You get the comforter and the sheets for less than their comforter alone.

A Queen ThermaCool is $200, and it comes with a free ThermaCool sheet set: a flat sheet, a fitted sheet and two pillowcases, in any size and any of 5 colors. A Queen comforter on its own from Slumber Cloud or Cozy Earth costs $299 to $388. So the whole bed is covered for less than one of their comforters.

Check any cooling comforter: are sheets included, or sold separately?
"I have always been a hot sleeper and between this comforter and the bamboo sheets it came with I sleep so much better."
Verified buyer

Queen prices, regular prices on each brand's website as of October 7, 2026. Free sheet set: choose any size and color at checkout; regularly $139.99 to $179.99 by size.

How ThermaCool compares

DosazeRestBuffySlumber CloudCozy Earth
Price (Queen)$200 + free sheets$229$250$299$388
Cool-to-the-touch sideYesYesYesYesNot listed
Heat-absorbing fillYesNot listedNot listedYesNot listed
TENCEL™ side or fillYesYesYesNoNo
Free sheet setYesNoNoNoNo
Machine wash & dryYesYesNoYesNo
Trial60 nights30 nights50 nights30 nights100 nights
Refund feeFree$10FreeFree3% / $11.99
Warranty3 yrs1 yrNot listed180 days10 yrs
  • Dosaze
  • Rest
  • Buffy
  • Slumber Cloud
  • Cozy Earth

As listed on each brand's website as of 10/7/2026, Queen or Full/Queen. Sale prices shown that day: Rest $148, Buffy $200, Cozy Earth $329.80. Buffy's refund-policy page says 30 nights. Cozy Earth's 10-year warranty requires its duvet cover.

Cools three ways, washes at home, and the sheets are free.

Now Free ThermaCool Sheet Set With Every Order (up to $180 value). 60-night sleep trial.

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What hot sleepers say

4.9 from 57 reviews
"This comforter is everything they claim it is, cool, light as a feather, soft, beautiful, and like sleeping without one on. I deal with heat intolerance and can use this every night with my little portable air and fan on."
Kim M., verified buyer
"I love this comforter! It is always i mean always cold. I keeps me so nice and cold during the evening. I do wish it was a little heavier but thats just my preference."
Haylee R., verified buyer

Try it for 60 nights.

Now Free ThermaCool Sheet Set With Every Order (up to $180 value). Free shipping, free returns.

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TENCEL™ is a trademark of Lenzing AG.

Phase-change fill and fabric composition per Dosaze product specifications. The image in reason 1 is an illustration.

Competitor features, prices and terms from each brand's website as of October 7, 2026.

Free ThermaCool sheet set: choose any size and color at checkout. Regularly sold at $139.99 to $179.99 depending on size.

Warranty covers manufacturing defects; see our warranty page.