Fento Original Max Protection CapsPrevent dirt, sand, or gravel getting between the knee protector and the knee. Can be attached to the FENTO ORIGINAL or the FENTO MAX. Ensures the correct distribution of pressure across the knee and lower leg, which prevents knee and back complaints Once the inlay of your FENTO ORIGINAL has become worn after repeated use and no longer offers the right ergonomics, you need only replace this inlay rather than the whole knee protector.