The OTC 0309 knee support retains natural body heat to help soothe aching muscles and maintain flexibility, provide firm, uniform compression to support a weakened knee, and offers moderate protection from bumps and bruises. The high-tech, perforated material “breathes”, allowing perspiration and moisture to escape for extended wearing comfort. Handcrafted construction includes invisible stitching and heat seal seam tape for added comfort and durability. Effective support and value to keep you comfortably active. Excellent for use in athletics and occupational activities.