What Our Gearhead® Experts Are Saying:"I wore this on a storm day that dropped fast and stayed brutally cold, and the Omni-Heat Infinity lining kept me warm without ever feeling bulky underneath my pack. The interchange system meant I could strip down to just the liner during the hike out and still stay comfortable."Mountain weather rarely commits to one condition, and the Columbia Winter District II Interchange Jacket is built to keep pace with whatever it decides to do next. We think of a morning that starts clear and cold, turns into a full on storm by noon, and a jacket that adapts through every version of that day without slowing anyone down. Omni-Tech critically seam sealed construction keeps moisture out through wet, heavy conditions, while Omni-Heat Infinity's thermal reflective lining traps warmth without adding bulk. The Zip-in Interchange System lets riders wear the shell alone, the liner alone, or both zipped together for full protection, and 650 fill power RDS certified down insulation locks in heat even on the coldest lift rides.