Perfect Jawline: Just use this jaw exerciser for ten minutes every day, your jaw will have a more obvious jawline unconsciously. It can also improve the double chin, that you will have a beautiful side face. So as to create a younger appearance, say goodbye to double chin and loose facial muscles. Material Safety: This jaw exerciser is made of high-quality food grade silica gel, which is safe to chew and use. It is elastic and not easy to deform. It can be used for a long time. You can take it with you and use it anytime and anywhere. You will see the effect after a period of time. Easy to Use: Just put it in your mouth, gently bite it with your teeth and hold it for ten minutes. Rinse with water after each use. You can also soak it in warm water for a while and then put it in your mouth, which will be more comfortable. It is also equipped with ropes to facilitate your use outside. Reusable: This is a reusable jawline shaper. After each use, rinse it with clean water and dry it in the air, and then use it directly next time. There are three trainers in different colors for you to use and replace. It can not only help you to change the contour of your jaw, exercise a beautiful smile, but also suppress your appetite and lose weight. Exercise facial muscles: The size of the Jaw trainer is 1.7 * 1.2 * 1.4 inches/4.3 * 3 * 3.6 cm. It is moderate and will not make you feel uncomfortable when put into your mouth, but can effectively train facial muscles to achieve the effect of slimming your face. Weighing 24g each, it is light and soft without causing pressure.