Couple Silicone Mouth Gag BallThe mouth ball is High quality soft silicone ball offers a comfortable and reliable fit. Soft and smooth surface doesnt hurt your facial skin. Belt strap is made of superior poly urethane and PU leather. Although the surface designed to be soft and smooth for comfort, but the belt is strong enough to complete the restraint. The tightness of the head straps can be adjusted according to the size of different users through the strap holes.