This brace helps relieve pain associated with carpal tunnel syndrome and repetitive stress injuries. The brace has a metal palmar splint and a dorsal stay that stabilize your wrist at a 25º angle to alleviate compression on the median nerve--the cause of carpal tunnel syndrome. A patented lining facilitates blood flow and increases subcutaneous temperature by up to 3º F to reduce swelling, improve the mobility of tendons and ligaments, and help relieve pain. The brace is made from a breathable, moisture-wicking nylon and neoprene fabric that ensures comfort during extended daytime use or while you sleep. The brace has an adjustable strap to ensure a proper fit, it can be worn under clothing, and leaves fingers exposed to maintain your tactility. Specify right or left wrist. Unisex sizes are determined by the circumference of your wrist. If between sizes, order the next size up. S (5 1/2"-6 1/4").