This is a set of two hard-type appliances. Description: For those concerned about teeth alignment, overbites, snoring, or teeth grinding, or 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 vary. Single items and soft types are also available. Thank you very much. Please also take a look at my profile. Immediate purchase is possible(^^) If you wish, we also offer anonymous shipping (Nekopos), which is faster than regular mail, for an additional 50 yen.