SAFE MATERIAL: High quality organosilicon food grade organosilicon conforms to FDA standard, Is made of medical organosilicon material, No lead/phthalate /PVC/ bisphenol a, No latex. Easy to Clean, Wash With Mild Soap and Water. WIDE APPLICABILITY: This chewing necklace is suitable for babies and children. It is good for the growth of babies' teeth. The same is true for adults, And if you have a finger nibbling habit, It's a better alternative. WEAR COMFORTABLE: Don't worry that your child will hate it because it doesn't feel right,This chewing necklace is made of high quality nylon rope, Which makes it comfortable to wear. ABOUT DIMENSIONS: The length of the necklace can be adjusted by the buckle, So its size can be suitable for everyone. SATISFACTION GUARANTEE: If you have any questions about the Chew Necklace, Please contact us and we will get back to you within 24 hours and give you a solution. We Will Provide 180-day Money Back Service.