The haberman lovi soothers has been medically tested and created with the help of doctors to produce a soother which helps to protect the natural suckling rhythm of your baby the nipples have a dynamic action which means they extend and contract in with the natural rhythm of the child suckling the shield is designed to allow the free flow of air around the mouth and prevents irritation of babyrsquos sensitive skin and the contoured shape ensures natural breathing and that saliva is swallowed