Copper Fit Pro Series Compression Knee Sleeve 82% polyester, 14% spandex Imported High-performance copper-infused compression sleeves with built-in kinesiology bands Built in kinesiology bands provide targeted compression and dynamic support Comfortable compression helps provide rejuvenating relief and support for everyday aches and pains, muscle stiffness and soreness Supports improved circulation and oxygenation of working muscles which helps to reduce swelling for faster recovery Machine Washable: Lightweight, 4-way stretch fabric is soft and comfortable Moisture-wicking technology helps prevent chafing and rashes