Constructed with PolyShok with more than 150% more energy absorbency than traditional EVA mouthpieces. PolyShok is the optimum material that is used in dentist made custom fit mouthguards. Offers better breathing, effective speaking, outstanding comfort, superior protection and professional fit. Comes complete with permanent white fangs for an unbelievably intimidating look with champion results. Simply "boil and bite" and you're ready to go. Case included.