Features: 1. High quality: safe and non-toxic to use it. 2. High transparency, EVA thermoplastic material, better to fit. 3. Easy to use, the mouth trays can be formed. 4. Perfect for preventing teeth grinding at night and whiten teeth. Specifications: Material: EVA Suit for: Kids / Adult / Youth Applicable Scene: Basketball / Rugby / Boxing / Karate / Volleyball etc. Package Included: 1 x Night Mouth Guard Notes: 1. You can trim the braces to the right size according to your own shape. 2. You can place the tray into hot water about 70°C about 10-15 seconds to soften it. 3. The replacement time of the trays is 3-4 months 4. It is normal to feel discomfort for the first time to wear the tray. It is good to insist on taking two or three times to adapt.