X-Small * Fits knee circum. 11.25  - 12.5  (measurement taken just under the knee cap while knee is slightly bent)  * 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 degrees F  the optimal level to make tendons and muscles more pliable and elastic to provide optimal muscle function