Thanks to its 650 fill down insulation, the Mountain Hardwear Men's Kelvinator Hooded Down Jacket keeps you warm and comfortable from your hips to the top of your head in the nastiest weather that Old Man Winter can dish up. Marmot's Q. Shield down insulation maintains its loft and its insulating properties even when it's wet, so, unlike your buddy wearing regular down, you don't have to sweat those dark gray clouds too much. And the high loft down is easy to compress so you can easily stash it in a stuff sack and throw it in your pack when you head out to the backcountry. The Kelvinator jacket's 20D ripstop nylon fabric keeps the weight down without being tissue paper delicate, and an insulated, adjustable hood, dual hem drawcords, and elasticized cuffs lock in heat where it's likely to escape.