Thumbkeeper with D-Ring, Medium, Right. (Women’s Large and Men’s medium). Prefab splint without the disadvantages often associated with prefab hand splints. Fits many people without adjustment and can be customized if necessary. The flexible Multiform Thin splinting material outer shell is lined with cushioning AliPlast foam. The splint adjusts with the hand, constantly compensating for any change. It fits well and is comfortable to wear. User compliance is high. MP joint is held and protected. The standard Thumbkeeper with D-ring is recommended where maximum joint support and motion restriction are important. Use it in sports or work where impact and stretching are expected. Cinching the D-ring closures abducts the thumb so motion at the CMC joint is restricted even more effectively.