"Say Goodbye to Double Chins - This jawline shaper is ergonomic and fits the mouth shape, place jaw exerciser in your mouth, and simply bite down repetitively to train the 57+ muscles in your face and neck. Reshape your face shape, and make your skin tighter and strongerSafe & Durable - This jaw exerciser is made of food grade silicone, BPA free, making it safe for chewing on it. Slim and tone your face to help you reduce double chin and look younger and healthier3 Level Training - Each pack comes with all three levels. 30lbs(Yellow) for beginner, 40lbs(Blue) for intermediate, 50lbs(Grey) for advanced. You can distinguish different resistances by pressing the jaw exerciser with your hand, so choose different exercise tablets to exercise the jawConvenient to Use - Package Included Jaw Exerciser Set(YellowBlueGrey), It is very light, only 36g. Hands Free Workout, You can take this jaw exerciser to your working, bodybuilding, at home or on the road and do a jaw workoutPlease keep using it 10-15 minutes a day, you will gain confidence and health after 30 days. "