While polycotton bed sheets may keep you warm at night, they're not nearly as insulating as 100% cotton bedding. Polycotton bed sheets are less absorbent than cotton bedding, so if you sweat at night, those liquids can get trapped under the covers, leading to hot flashes and discomfort.
Polycotton is a cheaper alternative to cotton fabrics as it is a blend of both cotton and polyester, natural and synthetic fabrics. Often polycotton fabrics consist of 65% polyester and 35% cotton, but the blend can vary. It combines the breathability of cotton with the durability of polyester.
