bz wrote a review of Patagonia Down Sweater Vest - Men's on November 19, 2009
This is a perfect 'pack-always' gear item. It packs small, insulates well, layers well and is completely unnoticed in your gear until you need to pull it out. An integrated stuff sack makes it super easy to pack and I literally take it on every trip I go on, all 4 seasons.
Oh, and it's stylish. Shocking, I know.