1.This jaw exerciser & neck tightening devices is made of high- quality material and free food grade silicone to ensure safety. 2.Our double chin reducer consists of the same material as a baby pacifier. The polyurethane bite strip allows a custom shape for your mouth, allowing you to easily adjust the shape and oral cavity. Enhance Your Jawline and Say goodbye to double chin, Perfect Jawline exerciser and loose facial muscles. Look Younger and Better with A Chiseled Jawline. This Jaw Exerciser will strengthen your face. Look younger by using our Jaw workout Jaw toner see effects in as less as 2 weeks. 3.jaw exerciser offers you a hands-free, with our revolutionary technology this Jawline Trainer is a Powerful Face Flex Facial Exerciser. Our Jawline Exerciser is very easy and convenient to carry. Toning Exerciser Can Tighten Your Face fat removal exercise for the sharp and defined jawline of your dreams. It comes with a neck string so that you can hang it in your neck and use it anywhere you want whether it is gym or a workplace. 4.Do chin exercises every day to strengthen the muscles around your chin and muscles and relieve pain and promote healthy sleep cycles. At least 30 to 40 repetitions and then three sets per day. It will give result within 3-4 weeks. You can literally workout whenever and wherever you want.