The Thermoskin Thigh/Hamstring provides protection, support and heat therapy for the thigh and hamstring. The support aids in the prevention and rehabilitation of quadriceps and hamstring muscle strain. Useful in the prevention and treatment of groin strains and quadriceps-hamstring injuries. Thermoskin Technology: Thermoskin provides effective treatment and pain relief for Sports Injuries, Arthritis, Repetitive Stress Injuries and many other conditions. Thermoskin combines compression, support and naturally generated body heat for therapy and pain relief. Trioxon Advantage: Thermoskin"s exclusive Trioxon lining is soft and comfortable against your skin. Trioxon captures your natural body heat for therapy and pain relief. The three dimensional Trioxon lining provides insulation and wicking of moisture via air circulation. This allows the skin to remain well oxygenated and comfortable for extended periods. Clinically Proven: Only Thermoskin is clinically proven to increase blood flow, increase skin temperature, increase muscle temperature and minimize perspiration. This provides heat therapy to prevent, treat and rehabilitate soft tissue injuries. Thigh Sizing Guide: Measure circumference around middle of thigh muscle. X-Small 15 3/4 - 17 1/2 Inch. Small 17 3/4 - 19 1/4. Medium 19 1/2 - 21 1/4. Large 21 1/2 - 23 1/4. X-Large 23 1/2 - 25 1/2. XX-Large 25 3/4 - 27 3/4 Inch.