The brace uses Velcro locking straps together with a metal splint positioned at 25 degrees allows for increased circulation and provides the protection and rigid support needed for treating RSI (Repetitive strain injury) conditions including carpal tunnel syndrome. Thermoskin with trioxon offers natural heat therapy and support for injury and pain with perspiration control for long term comfort. Trioxon is designed to be soft against the skin minimising skin irritation. Comfort is not hampered by excessive perspiration because the spiral structure of Trioxon allows the skin to ventilate. Your Thermoskin support should be snug and comfortable fit not too tight and not too loose. If in doubt try the next larger size. Use of the correct size is essential for effective results. Thermoskin:-heat therapy-protects and supports-increases circulation-reduces swelling-avoids neoprene/elastic skin irritations