Medela's Nipple Care Series Contact Nipple Shield Purchased new and used about 5 times. Medela Nipple Shield 16mm 2 pieces With case Official description below: Can be used temporarily when nipples are painful or cracked, or when the baby cannot latch on properly. Made of thin, soft silicone, it is placed over the nipple before breastfeeding to protect the nipple. There is a hole at the tip, so the baby can drink breast milk from there. [Design for enjoying plenty of skin-to-skin contact] The Contact Nipple Shield is designed so that mothers can enjoy plenty of skin-to-skin contact with their babies. The wavy cutting on the top allows the baby's nose to touch the mother's breast. [When to use] ・When nipples are stinging or have scratches, or when you are suffering from nipple pain. ・When the baby has problems latching onto the nipple, or when the baby cannot drink breast milk well. ・In cases of flat or inverted nipples. [Comes with a convenient carrying case] The Contact Nipple Shield comes with a convenient carrying case. Please store it in the case when not in use. [How to use the Contact Nipple Shield] After washing your hands with drinking water and drying them completely, hold the edge of the Contact Nipple Shield and place it in the correct position. Wetting the shield with drinking water will make it easier to stick. When attaching, make sure it fits comfortably on the nipple without feeling pulled. Medela's Contact Nipple Shield comes in 3 sizes (S size (16mm) M size (20mm) L size (24mm)). Please choose the one that fits your nipple size.