About This Item:Mouth guard can be used as a dental protector, teeth whitening trays, and sport mouthguard. If you have problem with bruxism while sleeping at nighttime. You can use mouth guard to prevent your teeth (tooth) in your sleep. If you want to whiten or bleach your teeth, you can also use mouthguard as a teeth whitening trays along with whitening gel in whitening or bleaching process. Whether you are men, women, mom or dad with a child, teen, kids, children, or teens with a small or large mouth, if you have teeth grinding problems, nightguards fit for you and your loved ones. You can mold and customize the gaurds right at your own home with a boil water. It is adjustable to custom fit your mouth since It can be molded and remolded.Features:1. Three-stage physical correction therapy will provide 3 different hardness braces to correct crowded mild dentition, dislocation and uneven teeth step by step.2. Food grade TPE material, odorless and non-toxic, widely suitable for different people.3. Each dental brace is individually stored in a case for carrying and improved hygiene, and the transparent color appearance will enable invisible looks.Specifications:Material: Food Grade TPEColor: TransparentSuitable Age: AdultPhase: Phase I(D1), Phase II(D2), Phase III(D3)Instructions for Three Stages Use:The First Stage(D1): adapt to a few minutes for the first use, wear 12 hours a day after adaptation, use time 1-2 months.The Second Stage(D2): medium elastic hardness; suitable for mild and moderate teeth, insignificant, can be used directly, use time is 2-3 months.The Third Stage(D3): A stiffer material; suitable for further aligning the teeth or used as a holder to limit tooth movement, use for 3-6 months.How to Use:1. Hold the mouthguard with massage point down.2. Put the braces in your mouth and keep your tongue in the position of the tongue block.3. Gently bite the mouthguard and close your lips, keeping your nose breathing.