Cotton is by far the most popular option for sheets, with many different weaves available. The most popular types of cotton weaves for sheets are usually crisp percale, silky sateen, or soft jersey cotton, which is often blended with poly fibers for a soft and stretchy feel. Flannel sheets are also made from cotton with a napped (fuzzy) finish on one or both sides for an extra cozy feel. Rayon sheets are growing in popularity and are made with cellulose derived from plants, such as eucalyptus or bamboo. Linen sheets are made from flax and have a lightweight, airy feel that's perfect for hot sleepers. Microfiber sheets are generally made from synthetic fibers such as polyester, or they can often be a blend of polyester and cotton.