Choose the right gear for your climate: S1 for above freezing, S2 for below. Profila Softshell fabric powered by 37.5™ active particle technology. Profila Thermal in back and underarms provides maximum warmth and breathability. Three open back pockets and two zippered security pockets. Thumb loops in cuffs keep wrists and hands warm. Reflective elements add contrast to enhance nighttime visibility. Fitted cut provides streamlined body fit for enhanced performance.