The Lulla Doll imitates closeness of a caregiver at rest with its soothing sounds of real heartbeat and breathing and soft touch. The soft fabric will absorb parent's smell adding to baby's sense of security. Lulla's unique design is based on scientific research that shows how closeness improves sleep, wellbeing and safety. The aim of Lulla Doll is to help babies: Sleep longer (fall asleep more easily and sleep for longer periods at a time), feel better (experience less negative emotions and crying and decrease stress levels) and be safer (Stabilize heartbeat and breathing). The outer layer is made from soft natural cotton. The filling is made from ultra fine microfiber that is hypoallergenic. Washable - just remove the sound box. 0+ months.