Rest assured extra comfort night protector, compare to the doctor's advanced comfort brand*. Guaranteed to fit - get the best possible fit for your night protector by going to www.restassurednite.com. You'll find detailed fitting instructions and a video showing how to custom fit the night protector. If you are not completely satisfied with how the product fits or performs while in use, call our toll free number and we will send you a new night protector. We will also help you with the fitting process to get you on your way to a more restful, healthful sleep. *The doctor's is a registered trademark of medtech products inc., Irvington, NY, a prestige brands company. One size designed to be custom fitted for all. Molds to fit your teeth. Comfortable fit. Ends disturbing grinding noises. Quality guaranteed. One protector & storage case.