Copper Fit Pro Series Performance Compression Elbow Sleeve 86% polyester, 14% spandex Imported High-performance copper-infused compression sleeves with built-in kinesiology bands gives you support you need to succeed Kinesiology bands provides targeted compression and dynamic support Copper ions bound to the fiber level during manufacturing help reduce odors Provides support for muscle stiffness, soreness and pain Helps reduce the recovery time of muscles and supports improved circulation and oxygenation of working muscles