Running in winter conditions is challenging. Maintaining comfort for optimal performance in cold and wet environments requires protection from all the elements. The ARCTERYX Norvan SL Insulated Hoody is a minimalist, superlight, packable jacket for running in the inclement weather of winter. GORE-TEX SHAKEDRY product technology eliminates the need for a face fabric and does not require DWR treatments. Their designers developed innovative design solutions to insulate the jacket with highly breathable and packable Coreloft Compact 40 insulation.