Arc'teryx Atom LT Hoody

The Arc'teryx Atom LT Hoody is the most versatile insulating layer you can own. Coreloft synthetic insulation in the core keeps you warm even when wet, while the breathable fleece side panels dump heat when you're active. It self-regulates better than any layer I've tried. Wear it as a standalone jacket in mild cold, layer it under a shell in serious winter, or throw it on as a cozy layer at home. The Atom LT does it all. The articulated construction and stretchy fabrics allow full range of motion. The DWR-treated face fabric sheds light rain and snow. Packs down surprisingly small. At 12.2 oz, you forget it's in your bag. The price is premium but the versatility means it replaces 2-3 other jackets. Worth every penny.