Impact protection: Complies with the new XP S72-427 standard Easy breathing: 2 mm ventilated space lets air circulate as you exercise. Anatomic design: Thermoformable: adapts perfectly to fit all teeth. Puncture resistance: Single layer of material 5 mm thick. A NEW, SAFER DESIGN: Our mouthguard complies with the new XP S72-427 standard which stipulates the following features: Thicker to prevent perforation. Built-in breathing channel so that you can breathe even when your jaw is closed. Meshing of the upper and lower teeth to more effectively hold the jaw in place (protection against fractures). Covers the gums to stop the teeth from coming loose. Directions for use: Always wear your mouthguard during training sessions and in competition. To mould your mouthguard correctly, be sure to soak it in boiling water for the proper amount of time. This time is indicated in the instructions, and may vary from model to model. Watch the video tutorial to learn how to mould your mouthguard. To guarantee good protection, your mouthguard should stay in place when you open your mouth.Not compatible with braces. CARE ADVICE: Wash in fresh water. Leave to dry naturally before putting it back in its storage box (original box). For optimal protection, replace your mouthguard at least once per year or as soon as it starts to show signs of wear. CHOOSING THE RIGHT SIZE: S: Users 1.1 m to 1.4 m tall (CHILD) M: Users 1.4 m to 1.7 m tall L: Users over 1.7 m tall