Product Features: 1 cross typing structure: Cross support for the joints from the thumb to the wrist, suppressing and stabilizing the thumb bending. 2. Detachable elastic belt: You can roll it up to your desired strength according to the base of your thumb or wrist, etc. It is removable and can be removed when not needed. 3. Can be used for both left and right hands; Can be used for both left and right hand hands; no need to buy for right or left hand.