Adult bedding sets are a lot different from baby bedding sets for more reasons than just the size difference. Normally, there are crib bumpers on baby bedding sets. These bumpers are a fitted sheet for the crib. Sometimes, a comforter comes with drapes. The crib bumper is a stuffed long mini comforter that ties to the bottom of the crib rails right above the mattress. This is done so that in case the baby rolls over, they will not bang their heads and injure themselves on the bars of their cribs.