NXE Performance Fit ActiveSleeve (Black) LARGE Allows free movement while providing ample protection of your device. Lightweight, durable and made for long use High-end, breathable material stretches to fit any size/shape arm with extreme comfort Simple Velcro closure with textured grip tab allows quick access to device, as well as blind access when worn under clothing SLEEVE SIZE: (BICEP CIRCUMFERENCE IN INCHES) S: 7"-10", M: 9"-13", L: 11"-16", XL: 15"-18" Universal Sport Arm Sleeve For Smartphones; Athletically Inspired & Designed For Athletes; Allows Freedom Of Movement & Unobstructed Use In A Limitless Variety Of Athletic Activities