Stage 1 braces: hardness: soft.Period of use: about 1 month of use.Function: For adaptation to braces and primary orthodontics. Stage 2 braces: hardness: on the hard side.Period of use: about 2 to 3 months.Function: for further adaptation to orthodontics. Stage 3 braces: hardness: rigid.Period of use: about 3 to 6 months.Function: To increase orthodontic strength for later orthodontic treatment. FeaturesPhysical correction: 3 stages of orthodontic braces, good elasticity, with three different hardness braces, staged correction, make your smile more confident. Easy to carry and can be used arbitrarily.Soft and elastic material, suitable for different groups of people. Three stages: 12 months, 23 months, and 36 months to wear corresponding braces respectively. The first stage is softer and the third stage is harder. Tips for wearing braces:Step 1: Holding the braces in hand, there will be a little bit down and the top of the tongue upStep 2: Gently place the braces into the teeth in the mouth. Step 3: The tongue remains in the small square position. Step 4: Bite your braces lips up and down to keep them natural. Precautions1. Wear 12 hours during the day and 8 hours at night2. The dual role of tooth alignment and muscle function training will make the braces also play an effective role in the intermittent wearing time.3. After the soft tissue function is improved, the force of the muscles will produce 24 hours a day force on the teeth and jaw.