Signature Sports Boil Bite Type 1 Protective Mouthguard Teeth Shield Kids Black A new world standard in design. A classic Australian success. Type 1 suits most casual sports people. Full profile and pressure adaptable design deliver a new standard in efficient and elite level mouthguards. Has a comfortable fit to enable easy breathing, talking and drinking. Designed to fit mouth and teeth accurately to give better protection. 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.