I used to wear a one-piece jumpsuit and i will never go back to it...bibs and a jacket is the best way to go IMO...a good insulated carheart bib is warm enough for anything i do...i wear it bird hunting(if its cool out) to deer hunting and ice fishing...as wingbone said when you are field dressing or walking in and out you can just take off the jacket and your fine....seems more flexible also IMO..