(10 PAIR{20 PCS}) Sweat-Proof Comfort: Made of breathable, sweat-absorbent fabric, the sleeves help keep your phone dry from sweaty hands so you can game for extended periods. Universal Fit: With sizes to fit most hands, the adjustable velcro closure allows you to get a secure yet comfortable fit for any phone. Slip-Proof Design: These thumb sleeves feature anti-slip silicone dots on the fingertips and palms to keep your hands firmly gripped on your phone for maximum control while gaming. Convenient Pack of 10: Get excellent value with this pack of 10 pairs of thumb sleeves in various colors, so you always have a clean pair on hand.