The Ergonomic Sleep Positioner from Cocoonababy is adjustable dependant on the size of your baby and is made from high quality Fleur de Cotton and Tencel, a mixture of environmentally friendly and soft high quality, breathable fabric. By supporting your baby in a slightly curved shape foetal position it encourages a better night's sleep for the whole family. The design of this product allows your baby to sleep safely on their back; the safest position. Thanks to the specific shape of the baby wedge your baby can lie in a comforting, calming and reassuring position. The Ergonomic Sleep Positioner helps to: Improve the quality and length of sleep. Reduce waking with a start or Moro reflex. Limit reflux problems. Encourage all-round development. For use from birth (from 2.8 kg / 6lb 2.7oz) and until the child starts trying to turn over or to adopt a different position (approx. 3-4 months).