I too am a fan of bibs - even when I was at my thinnest (about 10 lbs less than I am now) regular shorts tended to roll at the waist. No problems with the bibs. They're stretchy enough to "pump bilges" without too much trouble. It's just when time comes for the, uh, "solid" elimination that they're a PITA (gotta get completely undressed just to take a dump! ).