Arc'teryx's Norvan SL is their lightest insulated waterproof jacket ever

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