Neither too soft nor too hard, but just right to support baby's delicate frame The scientific design encourages the perfect natural posture for babies to sleep on their backs and the tilt design helps to prevent reflux and Plagiocephaly (flat head syndrome). The adjustable hip pads reduce symptoms of colic and reflux and can be adjusted according to baby's height The breathable mesh fabric helps keep baby cool Suitable from birth to 6 months *Do Not Use If Your Baby Is Able To Turn Over On Their Own*