A June jaunt up the Grand Teton can blend four seasons in a single day. The new Ultralight Down Vest will block the wind and trap core warmth when temperatures plunge. High-lofting, extremely compressible, 800-fill-power premium European goose down is encased in an ultralight nylon ripstop shell that's ultra tough for its weight and sheds moisture with a Deluge DWR (durable water repellent) finish. The thin, thermally efficient silhouette further traps heat and is complimented by variegated channel construction that uses less down while remaining warm, and the vest slides easily over light layers or under a shell. Details: two zippered handwarmer pockets, a drawcord hem and stuffsack.