Tommie Copper Men's Performance Triumph Knee Sleeve 86% COPPER POLYESTER/14% SPANDEX Imported Comfortable compression that provides support for muscles and joints all day, every day. Ergonomic Design for articulated seaming. Compression helps relieve everyday aches CopperZnergy fabric eliminates odor causing microbes on fabric. Graduated 4D Compression Reduces muscle fatigue, damage, and injury Increased muscle and joint range of motion Improves circulation and oxygen delivery