63% Nylon, 28% Polyester, 9% Spandex Made in USA PERFORMANCE GRADE COMPRESSION – True Graduated Compression promotes increased blood flow and muscle stability in the leg, calf, and shin QUALITY CONSTRUCTION – made with a strong yarn. More durable than cheaper sheer sleeves IDEAL FOR RUNNERS – Compression for lower leg and calf provides advanced support and stability and can help reduce shin splints and leg pain MADE FOR OUTDOOR ENDURANCE SPORTS – but suitable for daily use on the job by nurses, law enforcement, and other every day warriors. 2 SLEEVES included. 100% Satisfaction Guaranteed. See Size Chart Photo.