The Philips Avent Nipple Shield in medium size is designed to help mothers continue breastfeeding through common nursing challenges. Made of soft, odorless silicone, it provides a protective layer between mother and baby while maintaining close skin contact. Key features: • Ultra-thin silicone material • Butterfly shape for maximum skin contact • Comes with sterilizing case • Medium size for optimal fit • BPA-free construction The shield is designed to help with various breastfeeding challenges including latch difficulties, sore nipples, or flat/inverted nipples. The medium size is suitable for most mothers, though other sizes are available. The included case allows for hygienic storage and sterilization between uses.