Sisu kids mouthguarda small but mighty mouthguard for small but mighty mouthssisu junior is our youth mouthguard designed specifically for kids ages 7 10 or those with a smaller bite with its quick custom fit and improved protection sisu junior allows your pro athletes in the making to play more safely than ever before and because its so comfortable your kids wont entirely hate you for making them wear a mouthguard everyone winsthe sisu kids mouth guard is made from a high tech thermoplas