Running is hard enough without adding layers of immobile clothing. When you need protection from wind and light precip without the bulk, you need the super lightweight and packable Gore Running Wear Air 2. 0 AS Vest. The bold colors will brighten up any gloomy day. Featuring a shell designed from Active Light Windstopper Fabric, the Air vest is the lightest piece of windproof clothing Gore makes. Like its heavier sister fabric, the Active Light is fully windproof while the mesh lining allows moisture to evaporate. The stand up collar's drawcord is adjustable with one hand to increase or decrease ventilation. Layered in conjunction with a base layer, the Air 2. 0 is all you need for Autumn and Spring running. The women's specific cut means less bulk at your waist and shoulders. The vest is finished with concealed back and chest pockets, and an inner pocket. Reflective details increase low light visibility as the days grow shorter.