Neoprene knee support – large 39.0 – 45.0 cm , Neoprene Supports , Protection , Warmth , Performance , Support , Rehabilitation , Top quality sports grade supports made in 3mm neoprene for maximum performance and durability. , Ideal for sport activities and everyday use. , Closed cell neoprene rubber provides warmth and support to encourage recovery and to help prevent injury to joints and muscles. Blood circulation is improved which assists the natural healing process.