Suitable for newborns up to around 9 months old. It puts less strain on the lower back than Ergo-style carriers, and the wide shoulder straps prevent them from digging in and hurting. It's also easy to put on, just slip it over your shoulder. It folds up compactly, so you can put it in your diaper bag, or it's convenient to have on hand for someone else to use for carrying the baby. Highly recommended for those who are expecting!