Some harnesses with breeching use this as an anchor instead of a crupper. The loop of a crupper is kept very clean. The croupiere (also "crupiere bacul" or "crupper") protected the horse's hind quarters. The rear of the saddle is sometimes secured by a crupper. Pack horse breeching may be supplemented with a crupper to provide additional stability. The crupper strap may be single or double (forked). If a crupper is too tight, it can cause severe chafing, discomfort and sores. A crupper has been a standard part of mule saddles for centuries. However, sometimes a crupper is used in addition to breeching. However, a crupper is more commonly used on riding animals in general. If it has buckles, the crupper is unbuckled and passed under the dock. Bakin, a padded cover that sits behind the kura (saddle) and covers the "shirigai" (crupper).