+ DESIGNED TO LAST: We GUARANTEE you will not grind through this highly effective dental guard for 3 years. The unique design of this dental guard prevents the back teeth from making contact. + MOST EFFECTIVE DENTAL GUARD FOR BRUXISM RELIEF: Designed by TMJ Dr. Spainhower to reduce nighttime clenching pains. + BEST VALUE DENTAL PROTECTOR: Contains Two (2) Guards and 1 Storage Case! Satisfaction Guaranteed!