These Nike knee and ankle supports are made with breathable mesh material and feature a perforated design for a comfortable fit. Knee support: size M Ankle support: size L The ankle support's tag is frayed from washing (see photos). The round, bumpy areas were, I believe, specifically designed to wick away sweat. This is a set. - Brand: Nike - Color: Black - Design: Perforated - Material: Mesh - Intended Use: Ankle/Foot Support