Thanks to removable filling in multiple layers this first pillow grows along with your little treasure. The cover of the pillow consists of the same layers as our mattress protector: • The air layer with our unique 3D structure keeps your baby breathing freely and avoids all contact with bacteria or allergens. • The absorption layer retains the moisture and keeps your baby dry. • The watertight layer keeps the pillow filling dry and acts as a barrier between the filling and your baby’s head. The thickness of the filling depends on the pillow size. A white pillowcase is available separately. Both the cover and the pillowcase are washable at 60°C.