The product is made of tribute satin material, the size is 7.5x4 inches in size, men, women, teenagers, the elderly are very suitable, breathable and not stuffy eyes, no pressure, but also ergonomic design, more suitable for some people who work too long and stay up late to sleep, unable to fall asleep due to strong light, or do not want to be disturbed when meditating。 Washing Note: Please use clean water hand washing, do not use strong alkali detergent, do not use high temperature water cleaning, it is strictly forbidden to expose to the sun, destroy the fiber, resulting in the fabric is easy to fade。 About after-sales: Dear customer, if you find that you have any quality problems with the products you purchased from us, please contact us as soon as possible, and we will reply to you as soon as possible.