45% Polyester 25% Vinyl 35% Polyurethane 10% Spandex 3% Silcone 2% Rubber Pull On closure Machine Wash Cold Abrasion-Resistant Zones provide Support. Flexible Foam with Strtegically designed cut outs enhances natural movement Sweat-Wicking material helps keep you dry comfortable. Dri-FIT technology helps you stay dry and comfortable. Size S/M 9.5-10.5 Size L/XL 10.5-12 SNUG PROTECTION. Nike Contact Support Shivers help shield you from cuts and abrasion with stretchy sweat-wicking fabric that conforms to your arm. Soft foam is made to flex as you move.