Zipped to the chin on a cold trailhead morning, the Drop Line Jacket wraps the neck in a collar lined with DriClime, a fabric that wicks moisture. Flatlock seams lie flat across the recycled polyester sweater fleece, so this full-zip fleece jacket moves with every stride without chafing, from a trail hike to a cold-weather run. What Our Gearhead(R) Experts Are Saying:"On resort ski days, I wear this as the mid-layer under my shell because the sweater fleece breathes through laps and still warms me on the lift. It is not windproof or waterproof, so I zip a shell over it whenever weather moves in."