Jawzrsize is designed to work out the full range of motion of your bite, giving you a stronger fuller look- the kind that botox and face fillers can only dream of. With 20-300 pounds of resistance, this small affordable piece of equipment will leave your face and neck visibly more toned and youthful. Place Jawzrsize in your mouth, and simply bite down repetitively to train the 57+ muscles in your face and neck. Made out of food grade BPA free silicone; proudly made right here in the USA.