McKesson Wrist Splint with Thumb Spica Thumb Spica Nylon / Cotton-Terry / Foam / Elastic / Spandex - EachAbout McKesson Left Thumb Splint, Small Medium (1 Unit) Ideal orthopedic solution for aiding in soft tissue injuries to the thumb, arthritis, tendonitis or De Quervain's Syndrome Circumferential, elastic contact closure straps at the forearm, wrist, and thumb to secure splint position and maintain support Lightweight outer foam shell with a cool, cotton terry liner that is fully perforated to help ensure ventilation constructed of breathable nylon