Supports and limits the motion of the thumb joints. Also comfortably supports the wrist and prevents rotation. Ideal for DeQuervain's Tenosynovitis, tendinitis, arthritis and sports injuries. Made of a unique C3™ Tri-Laminate material making it cool and comfortable to wear. The supple C3™ material allows for changes in the amount of swelling. The anatomically conforming stay and closures help restrict movement and provide maximum support. Fits either left or right.