A tried and true favorite among climbers, hikers, and backcountry skiers for years the Arc'teryx Atom LT Men's Hoody is alpine proven as a midlayer or a standalone piece. Built to handle a range of conditions and energy output levels this piece uses Coreloft™ Compact insulation, a synthetic that retains its warmth even if wet and has loft retention to withstand years of packing and unpacking. The outer shell is water resistant Tyono™ 20 denier face fabric, breathable and durable, with stretch side panels to improve fit and freedom of movement. The insulated StormHood™ pops up to add additional weather protect, with a back of the head cinch to keep it from filling with wind and a nice structured mini-brim to keep it from flopping in your eyes. Under a shell or as a light jacket on its own this is a great piece anytime you’re engaged in cardio in the cold, or the weather is changeable and damp. A versatile piece that’s part of your kit through all the seasons and days on the trail.