Don't miss a run with this warm half zip. soft and warm, rulu™ fabric Soft and warm Sweat-wicking Four-way stretch Quick-drying Added Lycra® fibre for stretch and shape retention features Thumbholes and Cuffins™ keep sleeves down and chills out Underarm gusset improves mobility and minimizes chafe Zippered pocket keeps your card and keys safe Reflective details This garment was treated with No-Stink Zinc™ to inhibit the growth of odour-causing bacteria on the fabric