Stretch resistant material and a longer design makes this ideal when more support is required to reduce CMC joint pain. Greater length at the wrist and the classic ThumSling wrap-around strap combine for a greater level of CMC support to reduce pain from CMC Joint Arthritis or Tendinitis. Open thumb design eliminates constriction and allows unlimited hand function. Hand or machine wash.- ThumSling NP, Left, Small/ Medium (083864) (Not to be sold on any third party online store or site, such as Amazon, Walmart, etc)