NWT The North Face Mens Size L Aconcagua 3 Vest Smokey Brown Down Puffer We created a cold-weather workhorse. The Men’s Aconcagua 3 Vest delivers core warmth from first frost to spring thaw. A 100% recycled body fabric is lined with a combination of down and synthetic insulations for targeted warmth without the bulk. This is the layer to keep you going when temperatures drop.