Tommie Copper Men's Performance Bounce Calf Sleeve 86% Copper Polyester, 14% Spandex Imported Helps shorten muscle and joint recovery time Compression helps relieve everyday aches. CopperZnergy fabric eliminates odor causing microbes on fabric. Ergonomic Design for articulated seaming. Graduated 4D Compression Reduces muscle fatigue, damage, and injury Increased muscle and joint range of motion Improves circulation and oxygen delivery