The sleep mask is made of high density Foam. Designed to fit every head size. Flexible and durable to surround your head comfortably, strap high elastic and easily to adjust, will not catch your hair. The mask is only 0.4 oz and 0.6 cm thick. Light and breathable material and smooth fabric let you release your facial stress and help you get into sleep rapidly. Our sleeping mask is more stronger than traditional blindfold, and will not fall apart easily.