(1)Material: The jaw exerciser uses food grade silicone to ensure safety. After washing it, you can put it in this mouth and use it. Non-toxic and durable. (2)Effect: The jaw exerciser can tone and tighten the facial muscles below to help reverse the signs of aging. Exercise facial muscles to reduce sagging, fine lines and smile lines, and look younger and better. It only takes 20 minutes a day to achieve amazing results. ;(3)Features: Say Goodbye to Double Chins and Loose Facial Muscles Jaw Toner Exerciser promotes firming tone and chin lift, scissor jaw shape and V line slimming by removing fat deposits around jawline and neck.z; (4)Easy To Practice: The facial exerciser jaw is small in size, convenient to carry, and a sports tool that can be exercised anytime and anywhere. (5)For All: Jaw exerciser women men can be individually adjusted according to the shape of the mouth and it can be used by anyone, regardless of age or gender.