This Physio Comfort soother for babies aged 16m+ is made of silicone, a hygienic and non-deformable material. The innovative SoftSense™ finish creates an extra soft sensation on baby's skin, designed not to disturb them whilst sleeping or leave marks on their face. The soft and thin base also allows baby's lips to close naturally, adapting to the shape of their face and mouth. The soft and thin base also allows baby's lips to close naturally, adapting to the shape of their face and mouth. The ventilation holes allows maximum airflow and reduces the collection of saliva; to keep babies' sensitive skin dry and free to breathe.