The Millet Women's LD Trilogy Down Blend Jacket sounds simple a lightweight down midlayer but it's a little more high tech than your average insulator. For starters, it's not filled up with down alone. Millet used a combination of 700 fill K Dry hydrophobic down and Microloft synthetic to provide the ultimate blend of lightness, warmth, water resistance, and packability, so you'll be protected on alpine adventures in all sorts of conditions. It also constructed the Trilogy from Pertex Endurance fabric, which is super light and incredibly tough, and treated the jacket with a DWR finish to repel water and keep you warmer on soggy alpine climbs, tough mountaineering objectives, and long, snowy ski tours. The ergonomic alpine fit moves with you and allows for easy layering, while the drawcord hem and high collar lock out drafts to make sure you don't have to deal with any more cold than necessary.