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When braving cruel wintry conditions to stand atop a towering peak, we layer with Norrona's Trollveggen Superlight Down800 Jacket. The rugged fabrication sheds sprindrift and resists abrasions, while the down-filled baffles help us hold onto our core heat. As we climb, the flyweight construction keeps us feeling light, and the elastic cuffs and drop-tail hem stop gusts from rushing inside.