You can hike in the rain worry free thanks to the Cloud Cover Packfly from Granite Gear. This durable pack cover is constructed out of lightweight Sil-Nylon Cordura and is totally waterproof. . . . 30D Silicone, Cordura nylon. . Waterproof. . Durable. . Weighs 3 oz.. . Lightweight. . Fits up to 2500 cubic in.. . Imported. . 30399600022 923307