Comfort starts with your base layer. Made for lower output activities on cold days, the Rho Zip Neck adds warmth, is made with wicking fibers, and is super soft next to the skin. Its Torrent microfleece fabric is brushed for thermal performance and comfort, and a Polygiene treatment provides odor control. The trim fit layers easily, a deep front zip makes it easy to pull on and off, the tall collar adds warmth, and articulated patterning gives you freedom of movement.