Chewbeads are made with 100% silicone (similar to pacifiers & nipples). They are soft on babies gums and emerging teeth, easily cleaned with dish soap and water, and they're also dishwasher safe! Chewbeads contain no BPA, PVC, phthalates, cadmium, or lead. Chewbeads necklaces are a great sensory tool to help your baby focus while nursing, and they have a breakaway clasp for added safety.