Stella Mamma Non-Toxic Fashion Silicone necklace 2015-Y Necklace Made with high quality silicone(Similar to pacifiers and nipples), BPA free, Metal free Designed by Stella mamma. Varied size and shape make it looks unique, and can help to develop sensory for your little one. Great choice for people that have sensitive skin and are allergic to metal products.Best product to avoid Cadmium Poison Risk from cheap metal necklace. Safe for baby to chew on under supervision You can choose necklace with safety break away clasp or no clasp option.Free cord/ clasps replacement will be provided on request. Easy to take care of (dishwasher safe), and keep nice condition longer than metal. Depends on thickness of necklace and how you use it, all silicone products can fall apart if adult and children chew heavily.