1With high tension, high temperature resistance, fadeless, deformation, waterproof. 2Environmentally friendly silica gel material, comfortable feel when using, good flexibility. 3Can meet ROHS, SGS environmental certification and nontoxic test. 4The designs is fashionable and can be used as a baby comfort toy, loved by baby. 5Suitable for infants, older children and even adults who need to chew the necklace for biting or oral fixation.