9 Best Cooling Comforters of 2024, Tested by Bedding Experts

9 Best Cooling Comforters of 2024, Tested by Bedding Experts

When it comes to cooling claims, there aren't many restrictions on what brands can say. Our textile scientists see many products that claim to stop night sweats and hot flashes, but these claims are largely unsubstantiated.

Choose a cool comforter that is lightweight and breathable. They may also have specific cooling technology or moisture-wicking fabrics. If you want to stay cool while using a comforter, keep the following in mind:

✔️ cooling technology: The most common cooling technologies in bedding are Outlast and 37.5. Outlast uses a “phase change material” to store and release body heat. (The brand describes it as like melting ice to cool your drink.) 37.5 is caused by moisture, which wicks away sweat before it can form.

✔️ Lightweight filling material: It's not as fluffy as real down because the clumps of down trap air, but unfortunately for those who sleep in sweat, it also traps heat. If you want to buy real down, choose one with a low fill power (the amount of space the down takes up). Anything under 600 fill power is best for summer because there's less air and less heat trapped.

Down alternatives are popular for cooling comforters because they don't trap as much heat as down. Some brands use merino wool, which has inherent temperature-regulating properties, while others use synthetic materials such as polyester. Even with alternative materials to down, the thicker the comforter, the warmer it will be, so making the comforter thinner will help keep you cooler. But finding a comforter that feels fluffy and luxurious without overheating can be a tricky balance. If you don't like thin comforters, we recommend an all-season comforter with other cooling features to give you the best of both worlds.

✔️ Cool touch cover: If you sweat while sleeping, look for a duvet cover that is breathable and moisture-wicking. TENCEL lyocell and synthetic materials wick moisture for a cooler feel. Covers with cooling technology, such as 37.5 and Outlast, also help regulate body temperature. Cotton has a soft, natural feel, making it popular for bedding, but it absorbs moisture, making hot sleepers more likely to sweat.

✔️ Be wary of “natural” claims. Some brands claim that their bedding is “naturally” cool because it is made from “bamboo” or “eucalyptus” fibers. These types of fibers are actually “regenerated cellulose” fibers known as rayon or lyocell, where wood pulp from various plants is dissolved in a chemical solvent before being extruded into an extruder to form the fibers. It means that. (For a more sustainable option, check out Tencel.) Because these plants have been chemically altered into fibers, the natural cooling effects of the plants themselves can no longer be applied. Bottom line: These materials may help you stay cool if they're lightweight and moisture-wicking, but not because they're “bamboo” or other so-called wood fibres.

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