Lansinoh's ?ontact Nipple Shields assist mothers to have a least challenging breastfeeding experience by placing a thin piece of silicone onto your nipples to act as a shield for breastfeeding so that your baby can feed easily from the breast. It is an effective tool for addressing short term latch-on concerns related to premature, small, or ill infants as well as flat or inverted nipples, tongue tie, lip tie, or overactive let-down. Making it the best nipple shield for newborns, it comes in a 20mm or 24mm size along with a protective case for hygienic and convenient storage. Lansinoh's contact silicone nipple shields have specially cut out designs to maximise skin-to-skin contact. It is also ultra-thin, super soft, flexible, made out of 100% silicone, and is completely BPA as well as BPS Free.