The vest version, the Arc'teryx Atom LT Men's Vest has all the performance features of the jacket in an incredibly striking package. If you’re accustomed to vests that look bulky and cumbersome you’re going to admire the clean lines and trim style of this vest, which loses nothing in performance for its presentation. It’s a lightweight, water resistant, and incredibly packable, vest with a durable but soft Tyono™ 20 with DWR face fabric paired with Coreloft™ Compact 60 insulation retains heat when wet and withstands repeated packing and unpacking. So go ahead and crush this down into the bottom of your pack, you’re not compromising its long term performance with squashing and rolling. Designed to be both layering piece and outerwear this striking and trim vest is the piece you need when you need core protection but not a full jacket, nice in autumn and spring weather, and a great support piece over a midlayer and under a shell when winter turns truly foul. Graceful lines, powerful performance, step up to a piece that looks sharp while offering great technicals.