Lightweight, contoured, abrasion-resistant ExoSkin Elbow pads are specifically designed to flex and protect the mountain bike and BMX rider. They\'’re also great for snowboarding and as a low profile skate pad. High density 8-link™ foam padding for elbow caps Exterior Kevlar® cover for maximum abrasion & tear resistance Six padded pockets for key impact areas to the sides of the knee Perforated Neoprene body for breathability Interior terry cloth lining for comfort & sweat absorption Velcro® straps make for a custom fit Contoured body for maximum comfort To ensure a perfect elbow pad fit, measure circumference of extended elbow and match to the sizes listed below: S 6 – 8 in (15.2 – 20.3 cm) M 8 – 10 in (20.3 – 25.4 cm) L 10 – 12 in (25.4 – 30.5 cm)