Abstract: A mouthpiece for a single reed wind instrument including a body having a beak and either a tenon or a shank, the body having a facing having a window, the facing supporting a reed secured to the body using a ligature, the gap between the surface of the facing at the tip and the reed forming an opening at the tip of the beak; protrusions extending laterally on either side of the window adjacent to the tip, a first surface of each protrusion being flush with the surface of the facing and a second surface of each protrusion being flush being flush with the surface of the beak on the opposite side as the facing, the first and second surface of each protrusion coming together as each member extends laterally from the body, the shape of each member configured to create a substantially lenticular cross section in the area where a player's lips are applied to the tip of the beak.