The Hamstring Sleeve prevents your hamstring from taking a pounding or helps it recover if it already did. Designed for wear on the right hamstring. Coolmax(R) fabric moves perspiration away from the body and through the fabric for rapid evaporation and cooling. EXO Web Support(TM) technology is anatomically constructed to provide targeted support to muscles for greater stability and power. Lycra(R) spandex provides muscle support and four-way stretch for a wider range of movement. Branded elastic cuff offers a comfortably-snug fit. Circumference 56-59 cm. 70% polyester, 30% spandex. Machine wash, line dry.