85% Polyester, 15% Spandex They come in sizes. Stretchable to fit most hair lengths. For men and women. Comfortable, breathable non-elastic band for a more authentic fit. A satin alternative. No elastic bands to create hairline friction. Save your edges Breathable, premium fabric 85% Rayon 15% spandex Keep hair free from frizzing just like a satin bonnet, moisture in, and lint out.