The end-all what if things go crazy bag-800-fill goose down and waterproof-breathable DriZone keeps you warm to 20 below. FunkOff liner-simply turn the bag inside-out, leave it in the light and voila, dirt and oils magically break down for a cleaner, fresher bag. Dual draft tubes, a zippered storm flap, an Expedition Jacket Hood, and fixed side baffles ensure total warmth at high altitude or Arctic temps. We weld the seams so you dont risk blowing one out due to abrasion, nor will water have stitch holes to sneak through. Toss your alarm or cold-sensitive batteries into the Internal Media Pocket, and make sure youre awake with juice in the GPS the next morning.