This teether is made from high medical grade Silicone material, 100% Bisphenol-A FREE. Silicone color is conformed with US FDA standards. Designed with textures that appeal to your baby and aid cranky baby during teething process. It relieves baby's irritability during teething process. Soft and flexible surface is gentle for your baby’s bruises or swelling gums. One-Piece design ensures best hygiene and safety without dirt-trap. Transparent ensures thorough cleaning. Non-toxic and Nitrosamine safe. Can be sterilized by steaming or boiling. Heat resistant up to 180'C.