Patagonia's Lightweight Reversible Down Sweater Cardigan pulls double duty for travel, stuffing down into its own zip pocket for the overhead bin, then popping back out ready to wear at the next stop. Flip it inside out for a completely different color and pocket layout, two on-seam zip pockets and a hidden zip pocket on one side, two drop-in pockets on the other, so one cardigan covers two entirely different looks. What Our Gearhead(R) Experts Are Saying:"I stuffed this into its own pocket when a gate agent said my carry-on wouldn't fit, and it disappeared into my bag without bumping anything else out. It came right back out just as warm two flights later."