The design of the Moby Wrap uses your entire back, as well as your shoulders, to carry the weight of your baby. Unlike other carriers, which have narrow straps or go across one shoulder, the Moby Wrap is a wide piece of durable fabric that is wrapped over both shoulders. It is amazingly comfortable and easy to wear. There are no buckles, snaps or other fasteners (that may break or bend). It is easy to adjust the fit of your Moby Wrap by varying how tightly you wrap yourself and baby. Moby Wraps are one size which means all caregivers can easily and comfortably share one wrap.