SAFE AND PREMIUM MATERIALS - Our thumb suckers are made of food-grade silicone, which is reliable, durable, and non-toxic for babies. The product contains no metal parts to help prevent accidental injury. The thumb guard is firm yet soft enough to avoid interfering with baby teeth development while helping to break the thumb-sucking habit. ERGONOMIC DESIGN FOR CHILDREN AND BABIES - This adjustable thumb-sucking deterrent is designed for children aged 3 to 36 months, offering a comfortable and natural way to discourage thumb sucking. The thumb stopper features an adjustable wrist strap that helps keep the cover securely in place. REUSABLE AND DURABLE - Clean and maintain hygiene by sterilizing the thumb protectors in boiling water. Made from high-quality silicone resistant to temperatures up to 180 degrees Celsius, the product resists bacterial growth. Thumb-sucking covers should be cleaned at least once daily. EFFECTIVELY BREAK BAD HABITS - Discouraging thumb sucking is important as prolonged use can affect finger skin and dental development. ALL PRODUCTS ARE SUBJECT TO STRICT QUALITY INSPECTION. IF YOU EXPERIENCE ANY QUALITY ISSUES OR ARE DISSATISFIED WITH THE PRODUCT, PLEASE REACH OUT FOR SUPPORT. WE ARE COMMITTED TO PROVIDING A SATISFACTORY SOLUTION.