Description: For those concerned about teeth alignment, protruding teeth, snoring, or teeth grinding, and for those who want mild orthodontic treatment! It fits gently on the teeth and gums, and can be easily removed by yourself. Material: Plastic Target: For those aged 12 and over Type: Transparent, hard type *Individual differences may occur. We also have listings for sets of 2 and soft types. Thank you very much. Please also take a look at my profile. Instant purchase is available(^^) If you wish, we also offer anonymous shipping (Nekopos), which is faster than regular mail, for an additional 50 yen.