If you wake with a tight jaw or your partner has told you what you do in your sleep, this is the cheap thing to try first. The guard softens in hot water so you can bite it into the shape of your own teeth, which is what makes it comfortable enough to actually keep in all night. Comes with a storage tray. HOW TO USE IT Soften in hot, not boiling, water for a few seconds. Bite down firmly, then cool it in cold water to set the shape. If it does not sit right, reheat and try again. A note: persistent jaw pain is worth mentioning to your dentist. IN THE BOX Night guard and storage tray. DELIVERY Typically with you within 9 days. 14 days to change your mind.