The horse-friendly gymnastic reins, which have been developed by Passier together with the horse trainer Horst Becker, offer the horse freedom of movement in all directions. Instead of exerting influence on the horse's tongue and jaw, they exert influence on the corners of the horse's mouth. In order to prevent injury to the horse in a potentially dangerous situation, the reins have emergency hooks which are designed to break under undue pressure. With the soft, detachable head piece padding, the gymnastic reins can be combined with any snaffle.