From sprinting along frigid forest trails to high intensity Nordic skiing, the Patagonia Women's Thermal Speedwork Zip Neck Top keeps you toasty warm in freezing conditions while efficiently managing moisture during high octane pursuits. This 12 zip performance top works great as a standalone piece or worn over a low profile baselayer on especially cold days. Smooth wearing and durable on the outside, Speedwork fabric actively wicks perspiration off your skin while resisting outside abrasion during aerobic sports. Its brushed lining lends cozy comfort. Additionally, it features Polygiene permanent odor control for extra freshness, thumbhole cuffs for added warmth, and a zippered chest pocket for easy stashing convenience.