Description Safe Material:Our shark tooth design chew necklace is made of food grade silicone, BPA free, lead free, phthalates free,PVC free,safe and non-toxic. ^Adjustable: The length of the chewlery can be adjusted by the buckle, So its size can be suitable for most children. Its suggested to use it with children over 3 year old. Easy to Clean:Shark Tooth chewing necklace can easily cleaned by hand with soap and water. ^Anxiety and Stress Relief:These chewy necklace help to reduce anxiety and stress.Reduce chewing hands, pencils, clothes etc. ^Package includes 4 Pack chew toys for kids,the shark tooth shape design chew necklace is comfortable to wear. ^Minimum Manufacturer Age Recommended:3 years old.Not for children under 3 years.