When you're cutting the weight down to the absolute minimum, the Fast Wing Aero jacket is the protective layer that passes the test and slips unnoticed in your pack. Whip it out when the wind's biting. Fight back and move on with a reflective thread that is integrated into the fabric, meaning no extra seams or sections. Microperforation down the back gives this super light windproof jacket the winning angle: it lets air out, not in. MotionFit construction means this jacket has analyzed your every move and is all set to follow, however tough the ride for it knows no strain. Material: Taffeta Aerotech with Reflective Yarn.