KLOUD City Black Nylon Backpack Rain Cover for Hiking / Camping / Traveling(Two Size:L#M)) Package include two size backpack covers,made of 300D nylon material, durable and wear-resisting Protect your backpack from rain Adjustable drawstring and cord lock closure Dimensions (L x W x H): 8" x 9" x 32",16" x 9" x 27" The large size backpack cover Fit bag range from 3356 cubic inches to 4882 cubic inches,the middle size Fit bag range from 2135 cubic inches to 3356 cubic inches