A crupper is used to keep the equipment placed on a horses back from slipping forward. Cruppers are seen most often on horse harnesses. They are also used on the surcingles of bitting rigs, riding saddles, and, occasionally, pack saddles. The crupper consists of a loop (the crupper itself) and an adjustable strap (crupper strap or back strap) that connects the crupper to back of a riding saddle or the other parts of a harness. The strap runs from the horses dock, over the croup, to the saddle or to the back band of a harness. Adjustable tail strap in leather with rigid tail hoop.