What Our Gearhead® Experts Are Saying: "I pack these anytime weight and warmth both matter. They disappear in the pack, but once the temps drop at camp or in the tent, they make a massive difference. I like how easily they layer under a shell pant for winter trips without adding bulk."When the sun drops behind the ridge and the cold settles in, the Flash Pants are the layer we reach for to stay comfortable without overloading the pack. Designed by Western Mountaineering for cold weather camping and alpine missions, these down pants deliver serious warmth in a barely-there package, making them ideal for winter backpacking, shoulder-season overnights, and high-altitude camps where every ounce counts. Insulated with 850+ fill power goose down, the Flash Pants trap heat efficiently while compressing small enough to stash until they’re needed. A wind-resistant ripstop nylon shell blocks drafts, while thoughtful details like a reinforced seat, adjustable waist belt, and elastic ankle closures make them practical for everything from melting snow at camp to settling into a cold-weather sleep system.