The schiek elbow sleeve supports the elbow and is made with breath-o-prene which is a breathable neoprene product. Breath-o-prene is washable and expels moisture. It's made with pride in the USA. The Schiek elbow sleeve comes in three sizes, Medium, Large, or X-Large. If you are an average build, you probably wear a large. The Schiek Elbow Sleeve features include being made with Breath-O-Prene, it's comfortable, stretchable and breathable - and it expels moisture which reduces skin irritation.