Signature Sports Premium Type 3 Protective Mouthguard Teeth Shield Adults Black The Signature Type 3 mouth guard is designed for all sports to professional level and competition to professional level. The ultimate in comfort, fit and protection, it is a mouth guard that stays in place whilst playing your chosen sport. Its multitude of safety features rank it at the top of world retail mouth guard technology. The Type 3 has a special lower impact strip which helps secure the lower teeth against the underside of the mouth guard. This special impact strip aids greatly in reducing the risk of jaw injury and may help prevent concussion. This feature is highly recommended for the more serious sporting individual. The ProPlusGel. This gel fills the gaps between the mouth guard and your gums and teeth to ensure an intimate and secure fit. This makes the Type 3 Signature mouth guard a laminated quality product which is the closest retail product in the world today to the handmade, custom fitted/prescribed dentist mouth guard. Sizing is best approximated using your age and an estimation of your average dentition (mouth) size. As a guide use the below suggestions for deciding which size is right for you. Typically, males have larger dentitions then women. Particularly throughout youth and teenage years. Adults with smaller than average dentitions or strong gag reflexes are encouraged to consider teen sizes for comfort.