The dense foam of the 3pp® ThumSling NP provides a greater level of support to the CMC joint to reduce pain from arthritis or tendinitis. The open thumb design eliminates constriction and allows unlimited hand function for continued performance of daily activities with less pain or fear of dropping objects. Contoured strap provides support and compression at the CMC joint to reduce pain. Hook closures engage material anywhere on the splint for optimal fit and adjustability. Resilient, breathable material contours to the hand for a non-bulky support that can be worn all day or night. Flexible removable stay allows the wearer to increase the level of support for additional control when needed. Hand or machine washable. Latex-free. Moderate/Moderate Support. Size Circumference at MP's S-M 6" to 7 1/4" (15-18cm) M-L 7 1/4" to 9 1/4" (18-23cm)