Cut from the same fabric as the Jetstream Jacket, the Jetstream WINDSTOPPER Beanie is ideal for charging up steep faces in bitter cold or sitting motionless on a windy ridge. A lofted micro-grid fleece backer delivers warmth, while the GORE-TEX INFINIUM with WINDSTOPPER membrane blocks frosty drafts. A pony tail port keeps things streamlined and a four-way stretch, air permeable band warms the back of your neck and ears without impeding hearing.