Lansinoh Contact Nipple Shields With Case to help moms with latch-on challenges. Ultra-thin, super-soft, flexible 100% silicone. Lansinoh Nipple Shields are effective tools for addressing short term latch-on issues related to premature, small or ill infant, flat or inverted nipples, tongue tie, lip tie, or overactive let-down. *All nipple shields should be used under the advisement of a breastfeeding professional.