Weighing in at only around 4 ounces, the Airshed Pro Pullover from Patagonia is an amazing technical hybrid pullover windshirt hoody that will soon become one of your favorite layering pieces for all of your cool weather aerobic activity needs. Constructed with Capilene® Cool Lightweight polyester base layer material in the sleeves and hood, and ultra lightweight stretchy Pertex® Quantum DWR treated nylon fabric throughout the body for the perfect balance of wind and weather resistance and warmth while on the move. Other features include a deep front double zipper for venting and temperature control, a soft comfortable form-fitting hood for added warmth during pre-dawn departures, extra long sleeves that can be pulled down over the hands for extra warmth or pushed up the forearms for added cooling, and a stash pocket in the hood for ease of stowability when not in use. An awesome piece for approaching climbs and ski mountaineering descents.