Copper Blend Compression Knee Support, Knee Sleeve in Blue, Red, Black (1 Pair) 70% Bamboo Charcoal/20% Copper Threads/10% Elastin PROMOTES MUSCLE & JOINT RECOVERY - our Knee support relieves muscle stiffness, extra soreness and offers rejuvenating relief from arthritis, osteoporosis, tendonitis, pain & discomfort, allowing you to perform at your peak in any situation Bamboo charcoal fiber/copper thread blend is snug-fitting yet comfortable; won't restrict movement BETTER BLOOD CIRCULATION: oxygen circulation helps reduce lactic acid build up The natural anti-bacterial properties of copper help fight fungus and odor Fashionable style and colors