Adjustable Resistance Level: Whether you are a beginner or an experienced user, our jaw exerciser provides adjustable resistance levels to meet your needs. Start at a comfortable level and gradually increase the intensity[Hygienic Material] The jaw exerciser is made of 100% food-grade silicone, non-toxic and chemical-free, durable. It can be easily cleaned with just water and soap[How to use]: It is recommended to use this jaw trainer for 15-30 minutes each time, and can be trained 1-3 times a day. At the beginning, it is recommended to start with a shorter time and lighter intensity to ensure that the jaw muscles gradually adapt to the training[Make you look younger] The jawline exerciser makes you look younger and more beautiful with a well-defined jawline. Our jawline exerciser strengthens your jaw and neck muscles, makes your face slimmer, and provides a clear and wide jawline.