[FOOD-GRADE MATERIAL] Jaw exerciser is made of high-quality food-grade organic silicone-it is the same material as the pacifier used by children. Non -toxic, BPA-free, Latex-free silicone. Package includes: 1* Jawline exerciser. [HOW TO CHOOSE & USE?] From beginners to professional users, there are 3 forces to choose from (35lb, 45lb, 55lb). Beginners recommend choosing a 35lb face exerciser. Suggestions for use: Exercise 2 times a day, about 5-10 minutes of chewing exercises each time, stick to it for a month so that you can redefine your jawline and say goodbye to double chin. [WHY IT WORKS?] Our jaw exerciser is designed for face exercise, activating masseter muscles and fat through chewing action, increasing facial blood flow and oxygenation, burning fat deposits, achieving sculpting jaw line, tightening neck, eliminating double chin and improving facial appearance. [WHAT ARE OUR STRENGTHS?] Many jaw exercisers are made of inferior materials and improperly designed to easily cause damage to teeth and gums. Our jaw exerciser seeks to change your jaws and facial muscles naturally without any dangerous exercise. There is no risk of accidental swallowing while using it, it is a reliable facial muscle traine3r. [ANYTIME & ANYWHERE] Portable jaw exerciser, you can exercise at home, gym, office or on the go. The cleverly designed size fits comfortably in any mouth and fits very easily into the busiest of daily routines.