REI Kilo Expedition -20°F
It goes without saying that on a high-mountain trip, a warm bag is the difference between sleeping and shivering. Yet many climbers continue to lose precious zzzzs because they want to save weight or money–or both–on a cold-weather bag. If that’s you, get the Kilo Expedition and say goodnight. The 800-fill down bag is conservatively rated, and has a cut that’s efficient but roomy enough for layering clothes. The nylon shell’s DWR coating easily repelled tent-floor condensation and canopy frost. The Kilo closes with dual parallel zippers rather than a standard zipper and flap. The design eliminates cold spots, and also allows you to mircomanage fit and warmth (open or close the inner zipper). There was minor down leakage, and the zippers occasionally stuck, but neither problem is unusual in ultra-poofy winter bags. Bonus: It comes with a silnylon compression stuffsack. $359; 3 lbs. 12 oz. (regular); 3 sizes (short, regular, long). rei.com. Reader service #116
The Denali Test: Gear for America’s Highest, Coldest PeakOur tester spent 18 days climbing, camping, and evaluating gear on America's highest, coldest peak. If his picks made it there, they can make it anywhere.