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. . . . 20 D silicone, cordura nylon. . Waterproof. . Durable. . Weighs 3.4 oz.. . Lightweight. . Fits packs up to 3300 cubic in.. . Imported. . 30402200024 923314