The MAM Perfect Pacifier made with Dento-Flex® was created in response to independent scientific and medical research that shows that there is a correlation between soother usage and baby's jaw and teeth development. Thanks to Dento-Flex®, the MAM Perfect Pacifier's nipple neck is 60% thinner so that nothing gets in the way of healthy dental development. Made of smooth silicone. BPA, PVC and phthalate free. 6+ months.