"What Our Gearhead® Experts Are Saying: ""This jacket has been a lifesaver on alpine climbs where every ounce matters. The 800-fill hydrophobic goose down packs so small it disappears in my pack, but it lofts up fast and keeps me warm even when conditions turn damp. The helmet-compatible hood and light but tough Pertex shell make it a piece I trust for serious missions."" The Trilogy Icon LT Down Jacket is built for ambitious alpine days when warmth, packability, and reliability can’t be compromised. Millet engineered this jacket with 800-fill K Dry goose down, treated to resist moisture so we stay warm even in variable conditions. With 140 grams of insulation in a size medium, it delivers impressive loft without weighing us down. A Pertex Diamond ripstop shell provides a lightweight yet durable barrier, backed by a PFC-free water-repellent finish for added weather resistance. Mountaineering-ready features include a helmet-compatible hood, raglan sleeves for unimpeded movement, and harness-compatible pockets that stay accessible during climbs. The ACTIVE FIT keeps the silhouette trim without sacrificing mobility, and the whole jacket stows easily in its stuff sack when not in use. From technical expeditions to cold-weather cragging, the Trilogy Icon LT is an essential alpine companion."