A versatile synthetic insulated mid layer with generous weather resistance the Arc'teryx Atom LT Men's Jacket is designed for versatility, offering a high performance design for diverse activities and conditions. It has a minimalist design that is durable for its weight, a synthetic insulation with quick dry times and durability, and, importantly, retains warmth even when damp. Packable and performance this is a warming layer designed to be used on its own with a light and soft Tyono™ 20 shell fabric with DWR and stretch side fleece panels for extra ventilation, bringing the silhouette into that trim line that makes it ideal for layering under a shell when you need an insulating midlayer. The Coreloft™ Compact 60 insulation retains heat when wet and withstands repeated packing and unpacking, so you can crush this into your pack without worrying that you’re compromising performance over time. A mid-height collar with fleece lining provides cozy protection in weather, while minimizing bulk around the neck when you’re layering this as a midlayer. A secure zip interior pocket, a smooth cuff for ease in layering and a slight drop hem, this has all the technical features in a jacket with a streamlined and urban aesthetic. We’re giving this high marks for versatility, its packability and insulator make it four season useful for everything from summiting to travel, autumn rambles to cross country skiing, and using as that essential midlayer for winter backcountry treks and all day ski adventures. Clean, technical, and likely.. essential, the Arc'teryx Atom LT.