What Our Gearhead(R) Experts Are Saying:"I packed this for a few cold alpine starts, and it ended up living in my pack the whole trip. It weighs almost nothing, but once it's on, the warmth is noticeable right away. I also like that it stuffs into its own pocket-it makes it really easy to keep as a just-in-case layer on long days in the mountains."High-alpine days often start cold and warm quickly once we start moving. The North Face Summit Breithorn Vest is designed for those moments when lightweight insulation makes all the difference, delivering packable warmth that's easy to carry on fast-moving mountain missions. An 800-fill ProDown(TM) insulation provides high-loft warmth while maintaining compressibility for efficient packing. The Pertex(R) Y Fuse shell fabric improves downproof durability and water-beading performance while remaining incredibly lightweight. A slim fit layers easily under shells, and the vest stows into its own pocket when conditions shift. Internal drop pockets and zippered hand pockets provide storage for gloves, snacks, or small essentials during long days above treeline.