Outdoor research mens helium ii jacket lemongrass minimalist storm protection built for flash storm protection the 100 waterproof super breathable helium ii weighs an incredibly light 64 ounces an ultra compressible piece youll never leave behind its so light and packs down so small youll forget its clipped to your harness until you throw it on to ward off a sudden mid route downpour features fabric performance waterproof breathable fully seam taped laminated construction