? Satisfaction Guarantee: Every piece of product has been carefully checked before packaging. If you are not satisfied with your purchase for any reason, please feel free to contact us.PorsMingis pleased to help you solve any problems and refund you. We stand confidently behind our products!. ? Advantages and Applications: Lightweight and portable, fine workmanship. Suitable for travel, game (like hide-and-seek), party, meeting, break, sleep, etc. Also good for computer users, students, the elderly and office workers with heavy pressure who suffer from insomnia and difficult to fall asleep. ? Design and Functions: DESIGN: NOSE PAD design can block more light without making you stifled. DOUBLE ELASTIC STRAPS prevent the sleep mask from slipping off and make one size fit all. FUNCTIONS: Block light; block vision; Relieve eye nerve and vascular pressure, help to eliminate fatigue, improve the sleep environment, help people to get into sleep rapidly. ? Individual Package: Each pack has an individual package. Easy for store and handing out, keeps the sleep mask clean and from dust. ? Materials: Soft, satiny, permeable, opaque and comfortable. Both the inner surface and outer surface are made of satin fabric. The inner-layer padding is a sponge. All the materials are washable and will not lose shape.