This high-tech, lightweight cycling jacket has outstanding wind protection and thermoregulation properties. The new X-BIONIC® StreamLite G2 with integrated ThermoSyphon® technology increases active thermodynamics for improved sweat management. We've also added ergonomic sleeves for a better range of motion. New zipper air intake channels on the chest allow for maximum cooling when needed and can be closed on long downhill rides when the body needs to stay warm. The Symbionic® membrane provides more protection than traditional wind layers. As a SystemGear® product, the new StreamLite G2 can be combined with all X-BIONIC® Bike products.