This eye mask is made of polyester,size: 9.25 "x3.54". With adjustable straps for men, women and side sleepers, fits all head sizes. Comfortable for the head, highly elastic, easy to adjust, won't hook hair. Ideal for night sleep, naps, home and office, traveling, and indoor or outdoor lounging. Customize it by adding your school, sports team, organization or company logo or message using Heat Transfer. 100% guarantee for quality, qty for 2100pcs and over by ocean.