Thermal support for prevention treatment & rehabilitation of the knee * Provides protection and support against general wear and tear including sprains strains and twisted knees * Anatomically shaped in 3 pieces for more comfort and a better fit * Thermoskin increases elasticity of muscles tendons and ligaments to reduce the risk of injury when under stress and strain * Clinically proven to increase surface skin and subcutaneous temperature between 2-3 F the optimal level to make tendons and muscles more pliable and elastic to provide optimal muscle function * Measurement taken just under the knee cap while knee is slightly bent * Fits: 12.25 - 13.25