Wraps are a great way to carry your child from premature babies to 35 pounds.
Pretty much the only method of baby wearing that you can use for "Kangroo Care" - the skin to skin practice used to increase birth weight (i.e. use a wrap with the baby without wearing clothes for maximum skin to skin touch for the longest time while still covering mommy up enough to be able to walk around the house and do things that need to be done.
Soothes fussy babies immensely by 'cocooning' them - some methods of using the wrap are similar to the swaddle.
Stretchy wraps are best for newcomers to wrapping and best for those with newborns. Woven wraps do not stretch, giving better support for parents carrying heavier babies