High Quality - The mask is made of FDA approved, BPA and latex free material with no side effects or allergies. It also comes with a small case that is reusable, easy to clean, and provides good dust and stain protection. 4 Mouth Guards, 2 Different Sizes - Whether you are a male or female with different teeth and mouth sizes and shapes, you are guaranteed to find the best fit for our moldable anti-grinding night guard, which fits absolutely anyone. Support - We can wear the mouthguard while we sleep Prevents teeth grinding, acts as a night guard, and stops teeth grinding while we relax and rest. Protects you from grinding your teeth at night, protects dental health and improves the quality of sleep for you and your loved ones so everyone in the family can have a good night's rest. PRACTICAL AND EASY - Simply boil and bite in water to form a comfortable bite for a custom bite and then place in your mouth for great results. Includes easy step-by-step molding instructions and a durable travel case.