1、FDA-compliant, made of medical grade silicone material. 2、With cool design, it can be used for children with sensory seeking needs, such as autism, oral repair, thumb sucking, attention deficit hyperactivity disorder, restlessness or inattention. 3、Shark styling design. Easy to clean necklace, simple and convenient. 4、Suitable for infants and young children, older children even adults that need to chew a necklace for biting or oral fixation. 5、It is non-toxic, environmentally friendly and chewable. Features: 1. FDA-compliant, made of medical grade silicone material. 2. With cool design, it can be used for children with sensory seeking needs, such as autism, oral repair, thumb sucking, attention deficit hyperactivity disorder, restlessness or inattention. 3. Shark styling design. Easy to clean necklace, simple and convenient. 4. Suitable for infants and young children, older children even adults that need to chew a necklace for biting or oral fixation. 5. It is non-toxic, environmentally friendly and chewable. Specifications: Material: Medical grade silicone material Size: Approx. 6*5*1.5cm/2.36*1.97*0.59inch Color: Black White Blue, Black White Brown, Black Camouflage Brown Optional Package List: 3 * Teether Necklace