Material: TPEFeatures:Feature 1: Mouth GuardFeature 2: Orthodontic BracesFeature 3: Teeth RetainerFeature 4: Oral BeautyFeature 5: Dental Alignment StraightenerNew Teeth Orthodontic Braces ApplianceDental Braces Silicone Alignment Trainer, Teeth Retainer, Bruxism Mouth Guard BracesMaterial: TPEColor: TransparentNotice: Please do not soak it in hot water over 70CSize: 6 5.5 2.5 cmSuitable for: Age over 12 years oldUsage Stages:D1 (Soft) First stage, use for 23 monthsD2 (Moderate) Second stage, use for 45 monthsD3 (Hard) Third stage, use for 34 monthsCorrection Process:After using D1 for 1 month, gradually start using D2.Use D2 during the day and D1 at night.Once fully adapted to D2, begin using D3.Use D3 during the day and D2 at night.Must wear daily noticeable improvement typically in 46 months.Package Included:1 Pcs Teeth RetainerSpecial Structure:The product is made of medical plastic. A light plastic odor may be present; please rinse with saline or toothpaste before using.Functions:Lip block slows muscle contraction and helps develop good oral habits.Upgraded closed design helps eliminate bad oral breathing habits.Tongue tip support improves tooth alignment.Dental arch track uses two-way mechanics to improve teeth arrangement.