Basic Neoprene Knee Support with Open Patella includes standard pullover neoprene sleeve provides compression with therapeutic warmth. Neoprene is 3mm thick with double layer for added compression over the knee joint. Indicated for mild knee strains/sprains, Arthritis, and reducing edema. Color: Black. Features: Basic Neoprene Sleeve and Double Layer Around Knee Joint. Circumference at Knee Center: small 13-14".