https://www.Ora-GUARD.com Ora-GUARD® uses soft, medical grade material for fitting and to provide a cushion during clenching, but is built around a patented hard surface design that allows your teeth and jaws to slide naturally, protecting your teeth from the damaging effects of grinding and avoiding the “tension pain” in the TMJ muscle. Other Dental Grind Guards can't compare and this is precisely why Ora-GUARD® is simply the best dental grind guard on the market today.