Dynamic RS bits are characterized by an ergonomically shaping of the mouthpiece. They lie perfectly in the horse’s mouth resulting in soft and even pressure on the entire tongue area, encouraging the horse to chew. Therefore, Dynamic RS bits stimulate the horse to accept the bit more easily. This bit lies very quietly in the horses mouth as the cheeks prevent the bit from being pulled through the mouth. It avoids inconvenient pressure on the back teeth. The mouthpiece remains in the correct central position letting the rein aids work perfectly with the horses mouth. The cheeks are most helpful with turning aids especially with young horses. The gentle pressure against the face on the outside of the turn supports the riders aid making turns much easier for the horse to understand and for the rider to carry out. This bit is made of Sensogan, Sprenger's newest innovation in bit material. 14mm thick mouth piece.