The Arc'teryx LEAF Cold WX Zip Neck SV is a top of the line heavy base layer with warm, wicking fabric. The perfect base layer for high impact, winter activities. DESIGN: Cold weather base layer fits next-to-skin, providing warmth plus moisture management. Heavy weight fabric is durable and thermally efficient. Fit and patterning allow a full range of unrestricted motion. FEATURES: Fleece fabric has wicking properties and retains heat Flatlocked seams add comfort and reduce chafing Gusseted underarms provide a stationary hem that does not lift with overhead motion ¼ zip allows enhanced ventilation Thumb holes at wrist allow insulated coverage of wrist and knuckles Chest pocket with media port allows internal routing of communications cables MATERIALS: Polartec® Power Stretch® fleece