Designed for hikers, our iconic Atom Jacket has also been a longtime favourite of climbers, skiers, and snowboarders for breathable warmth in all kinds of mountain conditions. This long version gives you the same reliable Coreloft insulation (warmer through the body and lighter under the arms) that won't pack out or lose heat when it's wet—in a bum-covering length. It stands alone for a low-output day hike, slides easily under our long Beta shell for a clutch layering system that'll keep out any storm. What's been updated: Updated with additional recycled Coreloft™ insulation (from 60gsm to 80gsm) for more warmth, an added 2” of length for ease of layering with a hardshell, and a looser fit (including adding 4cm to the hip) to improve mobility.