Copper Fit Original Recovery Knee Sleeve 86% polyester, 14% spandex Imported The original copper-infused knee sleeve designed for maximum comfort and mobility 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 Lightweight, 4-way stretch fabric is soft and comfortable allowing for wear day and night Copper ions bound to the fiber level during manufacturing help reduce odors