Thumb Spica has a heat responsive moldable splint to provide support to the CMC & UCL joint. The locking strap provides extra stability to the brace. Thermoskin Thumb Spica provides protection and support to the ulnar collateral ligament, which is associated with football players and skiers sustaining debilitating injury to the thumb. This Thermoskin thimb splint is also useful for industrial related injuries. Thermoskin Thermal Supports utilize the exclusive patented Trioxon® lining that is clinically proven to capture your natural body heat. Unlike other products, Trioxon allows your skin to ventilate and remain comfortably dry even with long-term use. Competitive products trap the perspiration resulting in discomfort, slippage, risk of infection and unpleasant odor. The Trioxon lining creates a microclimate to help the skin breathe while still providing effective heat therapy. This is the secret of Thermoskins long-term comfort for the user. You can even wear Thermoskin for extended periods of time without the discomfort you would have with other products. How Thermoskin works: The application of prolonged heat therapy to the effected area is a simple and quick form of treatment. Heat therapy promotes healing by opening up the small blood vessels, increasing blood flow and facilitating the removal of inflammation. Heat therapy assists your bodys natural healing process. The combination of this heat therapy along with the support and light compression provided by Thermoskin Thermal Supports help prevent, treat and rehabilitate soft tissue injuries.