100% Brand new and high quality1.Straight Teeth System is simple and effective.2.It doesn't involve wearing braces or using complex and uncomfortable dental appliances 24 hours a day, seven days a week.3.Wearing Straight teeth System appliance for one to two hours each day and while sleeping,4.Combined with a few simple yet effective exercises each day is all it takes for a real change to occur, and to avoid needing braces in most cases.5.Braces are still the most effective way of straightening teeth, however they do not address many of the problems causing the crooked teeth.6.Most orthodontic problems, particularly crowded teeth and an underdeveloped lower jaw, are caused by habits such as mouth breathing and tongue thrusting.7.If these habits are not corrected, treatment time and the necessity for retainers will be increased.8.Once the braces are removed the teeth can crowd up again (known as relapse).9.Relapse can occur even with the best retainers.10.It is important to be better informed about the advantages and disadvantages of braces.11.Straight Teeth System is a no-braces approach to straightening your teeth and jaws. Specifications:Material:Food-grade Medical Grade SiliconeSize of Box:7.7 x 6 x 2.7 cm / 3.03 x 2.36 x 1.06 inchSize of Retainer:6.5 x 4.5 x 2.6cm / 2.56 x 1.77 x 1.02 inch Package Include:A retainer(Clear) + Box Instructions:1.General require user wear the orthodontic braces for 1-2 hours during the day, and 8 hours at night.2.At first week, your teeth may feel pain and soreness, this is normal. You need keep on using everyday.3.These orthodontic braces with good quality, but do not bite them, avoid deformation.4.Before and after use them, please clean with a toothbrush use cold or warm water, do not use hot water Then put them in clean box.Products from Bazhou's store