If you’re a hot sleeper, the search for bedding that feels both cool and comfortable can be frustrating.Many companies advertise (often pricey) sheets that claim to solve the problem by regulating body temperature or wicking away moisture. Do they really work?We tried several sets marketed as “cooling” sheets, and we compared them against our tried-and-true picks for hot nights. After months of testing, we still think that the most reliably cool, durable, and comfortable sheets are good old cotton percale and linen.