Medela’s Contact Nipple Shields are designed to address common issues such as latch-on difficulties, soreness and flat or inverted nipples. Moms can use nipple shields to enable continued breastfeeding, without interruption, until these problems are resolved.Moms will love:• Carrying case for transportation & storage• More value, with 2 shields included• Unique cut-out shape allows for more skin contact between mom and baby• Made with 100% ultra-thin, soft silicone• Three sizes support most moms: 16mm, 20mm, 24mm