The Medela Contact Nipple Shield in Large size is a breastfeeding aid designed to help mothers experiencing latching difficulties or nipple discomfort. Made from soft, BPA-free silicone, it provides a protective layer while maintaining skin contact between mother and baby. The large size (24mm) nipple shield comes with a protective storage case for hygienic storage between uses. The shield can be sterilized by boiling or steaming. As this is a personal hygiene product, please consult a lactation consultant or healthcare provider for proper sizing and usage instructions.