Very suitable for a newborn. Unlike a conventional sleeping bag, the baby has no arms "Candlestick" and arms are more mobile, this allows her to touch and reassuring. For a baby one month is too small to use as a sleeping bag swaddling as well but it should cover or carpet. It is light and good finishes. Seems breathable enough that the child does not sweat. The interior is in terry. One can easily forward it to the diaper bag by rolling it like a small mattress and use it as a small rug or blanket.