Safe Material: 100% food grade silicone and natural beech. The size of this silicone teething rudder is designed to be just the right size to prevent babies from swallowing. High temperature: Our silicone rudder can withstand a high temperature of 200 degrees, so you can wash it with boiling water (it is recommended to boil it for about 3 minutes). Note: The wooden ring cannot be boiled. Soothes Gums: This teether has a hollow design, is lightweight and has a suitable size, which is very suitable for babies. In addition to relieving the pain of babies' gums during teething, it can also be used for grip training for babies over 3 months old. Sensory Toys: This silicone teether is available in 3 Morandi colors, which can improve your baby's sensory skills. The surface of the silicone rudder is concave and convex, which improves the soothing function of baby's gums. The soft and flexible material reduces the risk of mouth injuries.