The Capilene® 4 Expedition Weight has the highest thermal performance in the Capilene family. Newly redesigned, it's warmer than our previous Capilene 4 baselayer, with improved breathability and faster dry times. A smooth jersey face glides beneath layers and a brushed fleece interior retains warmth, wicks perspiration and feels soft against the skin. With a deep zipper, snug-fitting collar, offset shoulder seams and yoke, a zipper garage and draft flap to help block cold. Made with 5.9-oz Polartec® Power Dry® with Gladiodor® odor control for the garment. Recyclable through the Common Threads Recycling Program.