UPTOFIT Women's Copper Wrist and Hand Sleeve, Lightweight Compression Brace for all Day Support of Carpal Tunnel, Arthritis, Tendonitis, Bursitis and Wrist Sprain, Large COPPER RICH - UPTOFIT wrist sleeve is truly copper rich, with a blend of 25% copper fiber, 45% nylon, 25% spandex and 5% polyester to provide muscle and joint support needed for improved mobility BREATHABLE MATERIAL - Our wrist brace incorporates moisture wicking polyester with stretchy nylon-spandex blend for a flexible wrap that promotes full range of motion while keeping skin dry and comfortable all day long OPTIMAL COMPRESSION - Tighter weaving creates optimal compression around wrist and hand, improving blood circulation that can help reduce inflammation, swelling and soreness, promoting muscle recovery and joint pain relief LIGHTWEIGHT - The copper wrist brace is thin and lightweight, suitable for everyday wear and ideal for sports such as tennis, golf, lacrosse, badminton, bowling, shooting, racquetball, biking, cycling, yoga, weightlifting and other daily activities