Large Quantity Value Pack: You will receive 50/100/200 pieces sleep eye masks packaged in a clear zipped travel bag. You can use them only once or multiple times, it is up to your choice. Simplicity Leads To Classic: Compared to those flashy but impractical styles, this value pack of black eye mask features the simplest design but the most practical functions. Help You Fall Asleep Quickly: The black fabric of blindfold can block out the light efficiently and help you fall asleep better whenever you use them for a trip or for a lunch break in office, classroom and even outdoor. Work for Wide Application: these eye shades are not only used to help sleep, but also suitable for team activities such as playing game, team building, travel, party, meeting, yoga, nap and so on. Eye Covers Material: main body-polyester; band-elastic belt.