Medically tested and created with the help of doctors they uniquely help to protect the natural suckling rhythm of your baby. Dynamic movement meaning it resembles a human nipple as closely as possible by contracting and extending in a similar way. A contoured shape is designed so it is as safe as possible for your baby by ensuring they swallow saliva correctly preventing choking. A surrounding shield is included to encourage the free flow of air around the mouth which benefits the ventilation of their airways and also by keeping that area clear and open to skin it reduces the contact with the skin, reducing skin irritation. Features: Designed with the help of doctors and medically tested they encourage the natural suckling rhythm of your baby They are dynamic which means that the nipple extends and contracts as they suckle mimicking a human nipple The contoured shape ensures natural breathing and that saliva is swallowed correctly The shield is designed to allow free flow of air around the mouth and prevents irritation of baby’s sensitive skin Three age ranges which are 0-3 months, 3-6 months and 6-18 months are available