Our premium alpine down jacket, guide-built for climbing, mountaineering, and all cold-weather activities. Durable polyester shell sheds moisture. High-loft Premium Goose Down insulation for ultralight, ultrawarm, ultra-compressible comfort. NOTE: Temperature ratings are based on a controlled laboratory test by an independent university lab. Also consider: your sensitivity to cold and wind-chill; time of exposure; activity level; and use of layering. Models shown are 5’9" to 5’11" tall, wearing size S/4, L/12, or XXL/18.