Who needs a multi-tool when you've got the ultra-versatile Arc'teryx Men's Atom LT Hooded Insulated Jacket working just the same' Metaphors aside, you might want to actually bring along a multi-tool (just in case), but for breathable insulation on any and all alpine adventures, you've got the jacket equivalent with this high-performing insulator. Ski touring, winter hiking, frigid ice climbing routes--the Atom LT can handle it all with a durable and lightweight Tyono fabric exterior, while the DWR (Durable Water Repellent) treatment fends off light rain and snowfall to keep you dry when overcast weather decides to throw a little moisture your way. To bolster its adaptability, the Atom LT is equipped with gusseted underarms and Polartec Power Stretch side panels to ensure an unimpeded range of motion whether you're wearing it as a midlayer or an external shell. Perhaps most importantly, though, is the Atom LT's synthetic Coreloft insulation. This breathable synthetic insulation not only retains warmth in wet weather, but also offers maximum thermal efficiency without compromising the compressibility of the fibers. A StormHood offers added coverage when your beanie isn't enough, and the adjustable hem provides a personalized, snug fit to keep the cold out.