Typical dental guards require boiling water and biting into hot plastic for fitting. SleepRight does not. With SleepRight's patented self-adjust dental night guard technology, you have two bitepads that comfortably fit between your upper and lower molars to re-establish your natural freeway space. The bitepads have five positions, making it easy to customize the fit for all sizes. They adjust forward for a smaller fit and backward for a larger fit.