"Cooling" comforters feel cool for a minute. This one stays cool for hours.

Most cooling comforters rely on cool-to-the-touch fabric that feels cold for a few minutes, then warms up as it soaks in your body heat. ThermaCool matches them at first touch — its shell tests above 0.4 Qmax, cooler to the touch than silk, bamboo, or cotton — and then its embedded phase change material keeps absorbing heat hour after hour, so the coolness lasts past the first few minutes.

No. Because the phase change material is embedded inside the fiber — not sprayed or coated on the surface — it can't wash off or wear away. The comforter is fully machine washable, and the cooling works the same after every cycle.

A NASA-inspired material that melts and re-solidifies right around skin temperature. As it melts it absorbs large amounts of heat — the way ice cools a drink — and as it re-solidifies it releases that heat back. Built into fabric, it actively regulates your temperature instead of just feeling cold.

Each side has its own job. The cool side is the PCM-embedded fabric that actively absorbs heat; the reverse side is a TENCEL™ blend that wicks moisture to keep you dry. Flip to whichever your night calls for.

Yes. PCM regulates rather than just cools — it absorbs heat when you're warm and releases it back when you cool down — so it stays comfortable across seasons, not just in summer.

Sleep on it for up to 60 nights. If it's not right, return it for a full refund — we cover return shipping — or exchange it free. Every comforter is also covered by a 3-year warranty.