Weatherproof Running Hat That's Easy to Pack. Stay protected and dry under any Seattle-style downpour in this weather proof running hat. Made from our DriLayer SuperSeal, it's seam-sealed for the ultimate in waterproof and windproof protection, yet remains fully breathable. An elastic back makes for a perfect fit every time, and a collapsible neoprene bill easily packs down without creasing. Rainy weather will never slow your stride with this waterproof running hat.