This open patella knee support is made of patented Coolprene® which wicks away excess heat and moisture, making it ideal for warmer weather wear. Made with an exclusive reinforced patella stabilizer to support weak, arthritic or unstable knees. Compression helps ease pain while the open patella design relieves pressure on the kneecap. Wrap around design with two hook-and-loop closures for a fully adjustable fit. One size fits most (measure around the knee joint) 12 ½" - 16".