EASY TO USE. This dental guard requires no boiling or microwaving. Its exclusive patented design with body-heat activated self-adjust technology provides a comfortable custom fit. STRONGER THAN COMPETITION. A mouth guard to stop teeth grinding has to be strong. These SleepRight Select dental guards have a 5,700 psi bite pad tensile strength and fully articulate to match the bite angle. SAFE TO USE. SleepRight Dental Guards have the best FDA safety record in their class with no FDA adverse events in 19 years. They are non-leaching and non-toxic with no BPA, latex, silicone, or phthalate.