49% Polyester, 41% Nylon, 10% Spandex Made in US SHIN SPLINT RELIEF: Engineered v-shape ribbing to precisely target shin splints for all activities MOISTURE WICKING: The sleeve will stay dry and lightweight during the toughest runs and workouts FASTER MUSCLE RECOVERY: Graduated compression will improve circulation by increasing blood flow INJURY PREVENTION: Can reduce calf cramps and micro tears, lessen fatigue, provide muscle stabilization USED BY ATHLETES OF ALL LEVELS: Sleeves are a favorite among athletes for their workouts and recovery PERFECT GIFT FOR RUNNERS: These stylish, premium leg sleeves make a great birthday gift or present for runners and athletes