Anatomically designed padding the gives you added protection to your elbow and forearm and flexes with your natural movement. Sleeves are left and right arm specific Moisture-wicking fabric keeps your skin dry and prevents sweat from building Non-slip silicone grip at the top of the forearm to keep the sleeve in place all game long, allowing you to focus on your play 88% polyester, 12% spandex with 210-220 gsm fabric Sizing (measure around widest part of the elbow): YL/YXL - 8 - 9.5", S/M - 9.5 - 11", L/XL - 11 - 13" The Sports Unlimited Padded Forearm Elbow Sleeve - Pair is designed to help you play your best while feeling fresh. The sleeve is made from 88% Polyester and 12% Spandex, with a light weight 210-220 gsm fabric. Anatomically designed left and right sleeves put padding in the places you need them and keep the rest of your arm free to move.