The Airshed became a favorite among Patagonia's endurance testers for delivering on-the-go breathability while simultaneously buffering wind and outwitting storms—it inhabits the sweet spot between baselayer and light shell. Born of discoveries from Patagonia's revolutionary Nano-Air®, the Airshed uses a soft, stretchy, whisper-light 100% nylon mechanical stretch ripstop fabric that helps create a highly breathable and fast-drying microclimate, whether worn over a thin tee or more insulative underlayers. The quarter-zip allows for venting, a zippered chest pocket doubles as a stuffsack (with reinforced carabiner clip-in loop) and the stretch-knit cuffs and hem seal out weather and maintain comfort. With reflective logo on left chest and center-back neck, and a DWR (durable water repellent) finish.