Women’s size medium, worn twice, Airlight hoodie, Warms when it's cool, breathes when it's warm. This full-zip jacket offers ultimate versatility and all the performance features you need for weightless comfort. Light as air and surprisingly warm, we designed this ultralight layer with a thin, low-profile baffle construction that actively increases thermal efficiency. That means you stay warm when the temperatures drop, but dry and comfortable during high-intensity activities.