[Food Grade Silicone: Made of 100% food grade silicone BPA-free tested by a CPSC-approved laboratory and CPC-certified babies can use it with confidence; 4-Piece Chew Necklace Set: The set contains four chew necklaces in different colors black gray white and red. Each necklace comes with a safe breakaway clasp and an adjustable cord for easy wearing and removal while ensuring maximum safety; Unique Design: The teething necklace for baby is in the shape of a screw and the spiral texture can stimulate the senses and make people relax. These chewy necklaces are perfect for people with autism anxiety oral fixation special needs or general teething pain. It is also suitable for nail biting treatment and thumb sucking cessation for children and adults; Easy to Clean: These chew necklaces for sensory kids are easy to clean either by hand or in a dishwasher and can be boiled and sterilized at 100°C; "Perfect Gift: The teething toys can be widely used for a variety of people babies from 3-12 months Toddler Infants children teenagers adults and is a perfect gift for family and friends on Childrens Day/Christmas/Thanksgiving."]