Product Details Contents: 2-24 mm contact nipple shields with case. BPA free. Helps breastfeeding continue through latch-on difficulties. Designed for maximum skin-to-skin contact. Ultra-thin, super-soft, flexible silicone. Lansinoh Contact Nipple Shields are effective tools for addressing short term latch-on issues related to: Flat or inverted nipples; tongue tie; Lip tie; Overactive let-down. Use under the advisement of a breastfeeding professional. Also Try Thera Pearl 3-in-1 Breast Therapy: Hot and cold therapy packs designed to help relieve common breastfeeding challenges, including engorgement, plugged ducts and mastitis. Join the Moms' Club from bump to breastfeeding. Looking for more breastfeeding tips and information? Join the Lansinoh Mom's Club for free, personalized advice and offers. Visit Lansinoh.com/AboutLMC. Connect with us! Facebook. Twitter. Pinterest. YouTube. Instagram. Google. lansinoh.com.