Specifications: Suitable For: Phase I + Phase II + Phase III Type: Teeth Aligner Color: Transparent/Blue Material: Silicone Identifying the Three Stages: By the number on the packaging Transparent Stage 1 - YG21905-2 / Transparent Stage 2 - YG21905-4 / Transparent Stage 3 - YG21905-6 Blue Stage 1 - YG21905-1 / Blue Stage 2 - YG21905-3 / Blue Stage 3 - YG21905-5 Package Contents: 1 x Teeth Aligner or 1 set (3 pcs) Teeth Aligners Function: (It is recommended to purchase in three stages (D1 D2 D3). When used in this way, the effect is faster and more obvious) Phase 1: Tooth Surface Correction Hardness: Soft Lifespan: 1-2 months Function: Used for adapting to aligners and primary aligners Phase 2: Root Correction Hardness: Moderate Lifespan: 2-3 months Function: To further adapt to aligners and improve the correction effect Phase 3: Consolidation and Shaping Hardness: Hard Lifespan: 3-6 months Function: Increase the correction strength for later shaping. Features: Made of food-grade silicone material, non-toxic, odorless, healthy, and safe. No color change; it will retain its original color and not yellow, no matter how long you use it. Groove design fits the tooth surface well, allowing for normal breathing and protecting your teeth during training. It can reach the back molars for complete protection. Invisible color; you can witness the tooth change process. It can improve facial shape to promote normal jaw development. Can be used as a late addition to maintain certain dental problems. Instructions for Use: 1. In the initial stage of use, the usage time should not be too long. It can be gradually increased and adjusted. 2. If you feel discomfort or pain in your teeth, take it off, rest, and then use it again. 3. Don't clench your teeth tightly at first. After adaptation, the occlusal force can be increased. 4. Use it for 1-2 hours a day after adaptation. Once your teeth get used to the aligner, the usage time can be increased. 5. Teeth straightening is a long process; be patient for the effect. Don't doubt their effectiveness; they need time to prove themselves.