In addition to the seat and panels, English saddles feature leather flaps on either side; the underside flap is called the sweat flap, and the upper flap is called the saddle flap (or, simply and appropriately, the "flap"). The flaps sit between the rider's leg and the horse's side and protects the horse from being pinched by the stirrup leather or girth, and the rider's leg from being chafed by the girth buckles. On some saddles it is also specially padded to protect or support the rider's knee.