BIBS pacifiers have been on the market for over 40 years. They know what they are doing when it comes to the comfort of your baby. Made from natural rubber latex, the nipple resembles the shape and size of the mother's breast to support natural breastfeeding. The nipple has a valve that lets air out when baby closes down. The nipple flattens to shape naturally after the baby's oral cavity. The shield is made from 100% food-safe material, completely free from BPA, PVC, and phthalates. The round lightweight shield faces away from the delicate and sensitive skin around baby's mouth to ensure minimum contact with baby's nose and mouth. It lessens the chance of saliva build-up that can cause rash and irritation. The shield comes in one size, no matter the nipple size. These pacifiers are manufactured in Denmark.