The physio soft soother actively favours the correct development of the mouth promotes the natural positioning of the tongue; evenly distributes the pressure on the palate for proper oral development. The base of the shield is soft and rounded such as the breast of the mother, this allows for a comfortable support of the lips and reduces the stagnation of saliva, due to irritation.A one piece soft soother, the soother being in one piece helps to prevent germs from leeching into any cracks and parts of the soother; as there are none. Soft silicone wont disrupt or irritate baby as they sleep. Allows baby's lips to rest comfortably on the soft soother. They allow air circulation, preventing the gathering of saliva.