Arc'teryx's Norvan SL might not look like much from the outside but that's the whole point. This minimalist and packable jacket is all about performance with a lightweight construction that uses Gore-Tex Shakedry that eliminates the need for DWR or a face fabric to keep things waterproof and breathable. It also has Coreloft Compact 40 insulation to keep you warm and a Dope Permeair 20 liner that helps keep moisture in check and removes any excess heat. 

$399, arcteryx.com