l kno u use them to learn jumps....

u te it on your snowboard and then im not sure.

Some rinks use harness systems to help skaters learn jumps in a controlled manner. The ice rink installs a heavy-duty cable that is securely attached to two walls of the rink. A set of pulleys ride on the cable. The skater wears a vest or belt that has a cable or rope attached to it. That cable/rope is threaded through the movable pulley on the cable above. The coach holds the other end of the cable & lifts the skater by pulling the cable/rope. The skater can then practice the jump, with the coach assisting with the completion. Skaters might also use butt pads or crash pads that r inserted into the pants or stockings to cushion falls, especially when learning new jumps.

There is also POLE HARNESSES that many skates use. See links below for examples.