Safe & Quality Material - Our thumb sucking stop is made of food grade silicone material which is reliable and durable to use in month, 100% non-toxic for baby. There is no metal part in the product, in case to avoid any unexpected harm to babies. The hardness of thumb guard is also soft enough to ensure the growth of baby teeth will not be affected, but break the habit of biting thumbs. Ergonomic design for Kid & Baby - This adjustable thumb sucking kit is designed for kids between 3-36 months old kids, a Natural & Comfortable way to break the thumb sucking habit. The sucking thumb stop is designed with an adjustable wrist belt which can adopt wrist width from 1.95 inches to 1.5 inches. Tighten the wrist belt can also make sure the thumb cover not fall off too easily. Reusable & Durable - If you are wondering how to keep The thumb sucking stop clean and sanitary for the next use, you can disinfecting the thumb protector in boiling water. Our products is made by quality silicone able to stand under 180 which make sure there no harmful bacteria left on the product. The Thumb sucking stopper are suggested to be cleaned at least once a day. Effectively Breaking Bad habit - We suggest to use this finger sucking buster at least 4 weeks and it can reach a maximum 95% successful rate. Our product is 24/7 necessary, but it will be better to take off at night to get the thumb sucking treatment kit clean for the next day use. It's important for baby to get off thumb sucking habit, since it will not only hurt the finger but also affect the growth of teeth.