The Nike ACG Lava Flow Ultralight Therma-FIT ADV men's down jacket, in Black/Black/Summit White, is made for trail runs and hikes when the cold sets in. 1000-fill goose down provides maximum insulation at around 248 g, and the lightweight water-repellent nylon ripstop shell shields you from showers and damp air. The snug hood, two-way zip and hem bungee let you adjust the jacket to conditions, and it packs into its own pocket to slip easily into a bag. Wear it over a base layer or under a waterproof shell; reflective details included.