Bridles are usually made of leather. They are made of different parts which are buckled together. The headpiece, also called a crownpiece, goes behind the horse's ears. The browband is placed across the horse's forehead. The throatlach goes behind the horse's cheek. The cheekpieces extend across the horse's cheek and attach to the bit. The noseband goes across the horse's nose and under its chin. Some bridles do not have a noseband. Others have special nosebands designed to prevent the horse from opening its mouth too widely and crossing its jaw. Sometimes, a strap called a martingale is attached to the noseband.