What Nae said

It's actually pretty hard to describe how to wrap a baby, but it's really easy if someone shows you - which is generally either during antenatal classes or by the midwives in hospital once your bubs are here. Muslin wraps are also good to drape over the pram to stop stickybeaks poking their noses in if you're trying to get your babies to sleep as they are light enough to still let air through. Either are also good for using as pram liners, on top of a towel on the floor for nappy free time, I swear there's a hundred uses even if you never wind up using them as actual wraps....