Need to get a shell and I am kind of an "in-between" size - can sometimes where a L and sometimes an XL for shells - depending on cut and maker (44L jacket). At first, I would think get the smallest you can (less airspace to warm-up) but then again, perhaps if you can wear an XL - why not (you could throw a Primaloft under - if needed when colder). Any downside to going larger - other than the "steeze" factor? Is baggy better?