The Patagonia Nano-Air Bomber Jacket closes the gap between a fleece and a puffy, warm enough to be the outer layer on a cold morning and mobile enough to wear all day without feeling bundled. The air-permeable stretch ripstop shell and lining work together so the jacket breathes as output climbs, keeping warmth steady without requiring a vent zipper or a layer swap. What Our Gearhead(R) Experts Are Saying:"I reach for this when I want real warmth without the bulk that kills my range of motion. The stretch shell and lining move with me so the jacket disappears the moment I put it on."