What makes a baby carrier different than a baby sling?

The sling hangs off one shoulder and tends to throw the parent’s body out of alignment. The ERGObaby carrier evenly distributes the baby’s weight on the parent’s body. When using baby slings, one hand is often needed to support the baby, but the ERGObaby Carrier leaves both HandsFree. Also, a baby sling can only be used for smaller babies, whereas the ERGObaby Carrier can be used through toddlerhood.