The SUP atx ANKLE leash is easily detachable so that it can be used on any SUP board. The SUP atx leash features a double swivel design that eliminates tangling, a rail saver that protects your board, and a Velcro leg attachment that can be attached to your ANKLE. This leash also includes a nifty little hide-a-key pocket on the Velcro part of the leg attachment.