What you will receive: Each pack contains 15 teeth whitening trays and 1 mouth guard retaining box, enough for your daily use and replacement needs. Materials required: This mouth guard is made of high-quality EA silicone material, safe and comfortable, no odor, the smooth surface will not scratch your teeth or gums, the retaining box is made of approved PP, safe and strong. Will not be damaged easily and provide you with a good user experience. Multiple Functions: These reusable dental trays can be widely used for teeth whitening, tooth whitening, teeth grinding and tooth protection, can conform to most people's tooth shapes, are not easily deformed, protect your teeth well, and reduce the cost of the process Noise reduction is used. Practical and Portable: You can put the whitening tray into warm water for about 15 seconds, then take it out and put it on, the tray automatically shrinks to fit your teeth, very practical and easy, and the mouth guard case is portable, so you can have it with you Or a travel bag can be used. Easy to clean: These teeth whiteners are reusable and easy to clean, just soak them in clean water and remember to replace them with new ones after 3-4 months of use. "