From JNATER - Silicone Necklaces - For Sensory NeedsThe chewing necklace is suitable for someone with autism special needs ADHD or those who need oral stimulation.Helps focus & calm: This chewing necklace is perfect for people who need oral stimulation to reduce anxiety and focus. Reduce chewing on pencils hands clothes and hair.Safe material & durable: The sensory chew necklaces are BPA free PVC free phthalates free etc chew on health.Easy to clean: Our necklaces are easily cleaned by hand /dishwasher with soap and water to remove dirt.Breakway safety clasp: The chew pendants are equipped with a durable cord and separate buckle to prevent suffocation or accidents.Includes 3 chewing necklaces(black white blue)Caution:When using the chewing necklace all users must be under the continuous and direct supervision of an adult.It s not suitable for aggressive chewers.The product is not indestructible please check and replace frequently.