Adjustable strap design: the sleeping mask with adjustable buckle and strap can nicely fit most people to wear, it won't move or fall off while you're sleeping, flexible and elastic to surround your head comfortably, adjustable strap also prevents your hair from being entangled, not poking ears and temples Soft and comfortable material: the cute sleeping masks are made of polyester fiber material, which is soft, lightweight, breathable and comfortable to wear, helping you get into sleep quickly; Compared with traditional eye masks, ours are more durable and won't fall apart easily, these eye masks will not oppress the eyeball when wearing it Applicable occasions: these eye masks can fully cover your eyes, and the padding fabric at the bridge of nose in the inner side can block out light to make sure you sleep in total , suitable for using at home, in a hotel or on the plane, train or anywhere, nice travel accessory to help you feel rested and refreshed Good gift choice: these eye covers can serve as a nice gift for anyone wanting deep sleep or uninterrupted sleep, proper for your friends, relatives, colleagues and classmates on Valentine's Day, Christmas, New Year or birthday as intimate gifts, showing your love and care Funny animal sleep masks set: you will receive 4 pieces sleeping masks in 4 styles, this sleep mask can block the light and provide a better shading effect; Better effects after freeze for 2 hours, suggest temperature from 17 to 38 Fahrenheit degree, or more freezer which depends on your need; Size: approx. 21 x 11 cm/ 8.27 x 4.33 inch