Here's my favorite all weather system; first layer, synthetic wicking T shirt, med or lightweight synthetic or wool wicking underwear, tops and bottoms; next layer windproof (and bugproof) breathable nylon windshirt; use or remove as needed. Pile (pile is warm when wet and still lightweight, drys really fast) jacket and cap (I got the Patagucci version-on sale but Helly Hansen makes a good one too), heavyweight long johns. Windproof, breathable, nylon or nylon blend or wool whipcord pants w/ full separating side zips, big enough to fit over both pairs of long johns if needed. Waterproof/breathable hooded parka, big enough to fit over the 2 pr long johns and pile jacket. Wool or pile Balaclava hat (like a removable hood). Thin wool or synthetic glove liners, Mittens w/ windproof shell and thick removable liners. Mittens should be roomy to allow for good circulation in your fingers. Warm wool or synthetic socks and footwear appropriate to the temp (insulated boots in winter). In very cold weather or if winter camping or standing around a lot, add a lightweight (1 1/2- 2 lb) hooded down or syn filled parka big enough to fit comfortably over everything else. No cotton anything except possibly your outer shell. This kit works (adding or subtracting layers as needed) in all weather from 70 to -10. If it's colder than that I'd add insulated overpants or bibs as well. If you are doing heavy, rough work like farming make the outer layer something tough like filson or Carhart, add or subtract layers underneath as needed. I've never been cold using this system, even at -40. Have fun in the Arctic, sounds like a great adventure!