The Safe T Sleep HEADwedge is designed to be used under the Safe T Sleep Sleepwrap to assist the heads of babies to stay on alternate sides to help prevent baby flat, deformed heads occuring in young infants, which is a growing concern world-wide.The Safe T Sleep HEADwedge is most useful from first returning home from the hospital through to when baby is six months old. The younger the baby, the softer the head so in those early days after baby first comes home babys head will typically be softest. 100% cotton cover over a specially-designed triangular foam strip. Tested and proven design by the team at Safe T Sleep.The Safe T Sleep HEADwedge helps ensure natural baby head shape and normal brain development while allowing for movement that is natural during babys sleep and nap times.The Safe T Sleep HEADwedge is best used in conjunction with the Safe T Sleep Classic Sleepwrap or Travel Sleepwrap. Together with the Safe T Sleep Sleepwrap it is the only known clinically-trialled baby swaddle and head wedge. Tested to CPSIA standards, the Safe T Sleep HEADwedge is both phthalate-free and lead-free.Dont settle for less and avoid imitations. Safe T Sleep Sleepwraps and HEADwedges are the original, tested, safe baby swaddle and head wedge combination.The HEADwedge should not be placed loose in the crib or bassinet.