Jawline Exerciser is for anyone interested in health and fitness, who wants to create a more muscular, youthful appearance. It’s the hands-free workout that anyone can do. It is already helping people of all ages to tone, firm, and strengthen their appearance, by increasing blood flow to the face, neck and head. You can get a well-developed jawline by using our jaw muscle exerciser.FEATURES:-➤ Made from food grade silicone and polyurethane.➤ This is your new secret weapon to exercise your face.➤ Discover hands-free chin exerciser.➤ INSTRUCTIONS :To fit, first practice placing Jawline Exerciser and get the feel for how wide you should open your mouth.Put Jawline Exerciser with biting strips in boiling water for 20-24 seconds.Remove Jawline Exerciser from boiling water, shake off excess water, but don't wait too long to let it cool.Stick your thumbs through the hole, place, and adjust Jawline Exerciser so you are biting down on bite strips.Bite down and hold for 15 seconds to customize the mouthpiece to the contours of your own mouth.Remove Jawline Exerciser from the mouth and cool your imprints under cold water for a few seconds to permanently set imprints.