Warms when it's cool, breathes when it's warm – this quilted pullover has all the performance features you need for weightless comfort. Slightly Fitted: Softly shapes the body. Falls at hip. Why We Love It 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.