Comfortable Neoprene Copper-Lined Material A high quality blend of 65% neoprene, 35% nylon and the only support of its kind to be copper-lined. Double Fastening Strap A secure strap system to tailor support and optimize results for all day wear. Multi-Use Whether it's arthritis, carpal tunnel, thumb arthritis, tendonitis or tendinopathy, ganglion cyst or a wrist sprain / strain, our copper neoprene wrist brace will provide symptom relief in style.