When running through canyons, blue skies can suddenly turn gray, so we stride out with the Patagonia Storm Racer Jacket in tow. With those first raindrops, we pull this layer from within its own chest pocket. Patagonia's H2No waterproof technology sheds the downpour without making us feel stuffy underneath. The partially elasticated hood and cuffs stop droplets from rolling inside, and the hem cinches tight to keep out splashes and gusts.