Medela Nipple Shields, worn over the nipple and areola, have a special design that allows an uninterrupted flow of breast milk, while providing a larger surface for the baby to latch on to. Available in two sizes, Nipple Shields offer maximum comfort for mothers whose doctors recommend use of a nipple shield to help with latch-on difficulties. The Contact Nipple Shield also offers an open section that allows baby to stay in touch with mother"s familiar smell. Medela Nipple Shields are individually packed to ensure sterility. Because Nipple Shields may diminish the stimulation needed to sustainlactation, they should be used only with the supervision of a professional. Legal Statements: This and all items from Medela are excluded from all promotions and discounts except where otherwise noted on product detail pages.