A bridle is a piece of harness for a horse, specifically for the horse’s head. It consists of a framework of straps fitting over the head, with a bit to fit in the horse’s mouth; reins attached to the bridle help control the horse. It’s a period charge, dating to c.1566 in the Milanese arms of Borromeo [Insignia Nomina Cognomina Patriae]. The bridle has the bit to chief by default. For related charges, see snaffle-bit.
Richard of Windhaven bears: Sable, a bridle Or.