The Patagonia Lightweight Down Sweater Vest layers cleanly under a shell or over a midlayer when the evening cools down, then packs away the moment it's no longer needed. The hip length keeps core heat where it counts without adding bulk, and the recycled NetPlus construction means the warmth comes without the material tradeoffs of conventional nylon. What Our Gearhead(R) Experts Are Saying:"This is the vest I grab off the hook on the way out the door. It weighs under seven ounces, so it lives in a bag or jacket pocket until the temperature drops."