A bridle is a piece of horse tack that is used to direct and control the horse while riding. It consists of several parts, including BITS, nosebands, and REINS. BITS are metal pieces that fit into the horse's mouth and are connected to the REINS, which are straps of leather or webbing that are held by the rider. Nosebands are straps of leather or webbing that go around the horse's head and are used to keep the bit in place. All of these parts work together to help the rider control the horse.