If you are looking for support for the upper leg, thigh, and/or hamstring look no further. The Alpha Medical Compression Thigh Support is made from soft lightweight breathable elastic you will find the compression thigh support / hamstring support to be very comfortable and cool. Our 4-way stretch elastic provides uniform compression while the anatomical shape helps with comfort and blood flow. This support is ideal for runners and other athletes looking for support without the bulk and weight of neoprene. This item has a firming and shaping effect and can help hide the back of the leg jiggles. Size Guide: Measure around the leg 5.5 inches above the center of the knee cap. Small: 16″-17″ Medium: 17″-18″ Large: 18″-19.25″ X-Large: 19.25″-20.5″ 2X-Large: 20.5″-22″ 3X-Large: 22″-23″