Waterproof Backpack Rain Wonder Rain Cover Ultralight, 25L - 80L, Camping / Hiking / Traveling, By Native Planet polyester 70D Made of durable and water resistant 70D Polyester with reinforced bottom for extra protection. Drawstring for a snug fit. Fits up to 80L / 4880 cubic inches. Folds up into its own pouch Versatile design allows better fit for all types and brands of packs. Elastic attachment edge to secure the raincover in place. Made of durable and water resistant 70D Polyester Reinforced bottom for extra protection from sink-downs. Elastic clinch attachment edge to secure the raincover in place. Drawstring for a snug fit and security. Folds up into its own small pouch. Available also in light blue for high visibility in the dark and on terrain background colors. Versatile design allows better fit for all types and brands of packs. Available in four different sizes: 25L, 35L, 45L, 80L.