The Comfort Cool Thumb CMC Restriction Splint is a flexible splint designed to provide support to the thumb CMC joint while allowing full hand function, and range-of-motion. This product is an ideal option for use with CMC joint arthritis, and/or instability, tendonitis, tenosynovitis, or repetitive strain injuries. This splint is meant to be worn throughout the day and during normal activity. Affordable, simple and effective, this product is the perfect choice for at-home hand splinting.