Features: Nontoxic: All of our silicone beads necklaces are made of 100% food-grade silicone. Security certificates: With BPA-Free, Fda, and En71 certificates as security assurances, it is usually no risk to the baby. Unique design: Individually knotted beads, preventing choking hazards,offering babies comfortable grasping and teething experience andreducing moms' neck stress. Waterproof, heat resistant and odorless, a kind of soft and comfortable nursing jewelry and toy for baby. Stylish for mom to wear and safe for baby to chew, helping build closer bonding experience between mom and baby.