3 Levels – Food grade silicone jaw excerciser for Beginners, Intermediate & Advanced users (40 lbs, 50 lbs, 60 lbs resistance). 10 min of daily chewing the jaw trainer to achieve a defined jaw line. Perfect Workout - Our jaw exerciser targets the jaw muscles and burns fat deposits in that area working as a face slimmer. Unlike other mewing devices, ours will prevent your teeth, gum and joints from any harm. How it Works? – Activate your facial muscles (masseter muscles) while using our jaw trainer and increase facial blood flow and oxygenation. The exercises will tone your face & define your jawline. This is a perfect jaw exerciser for men and women for jaw workout. Practice anywhere - Our reduced size tablets (1.25x 1.25 x 0.86 in) enable you to workout in any public setting. You can easily exercise while the tablets are hidden in your mouth. Pack includes 3 carrying cases for each resistance level. Customer satisfaction is our #1 priority -if you encounter any issues with our jawline exerciser or wish to return them for any reason, we'll give you a full refund right away!