We love thermoregulation! Designed with strategically weighted Primaloft Active insulation, this jacket aims to keep you warm where it counts. Synthetic insulation retains warmth when it gets wet and the low-profile loft allows you to stay flexible and nimble. We also added reflectivity to help keep you visible in low light. water protection: Stretch Glyde and Fleece fabric are both water-repellent Designed for: Run Primaloft insulation active: Synthetic insulation to provide warmth Water-repellent fleece: Keeps you warm and dry without compromising mobility Layering options: Perfect under a shell for core warmth as the seasons change Sweat management: This jacket has perforation and breathable side panels to help you let off steam and avoid chills after outdoor sweat sessions Hand pockets: Perfect for stashing your stuff on the go