A second advantage of using a separate rain-cover as compared to a waterproof bag is that the cover can be used both to collect and hold water in a survival situation.
Multiple colours and backpack litre capacities to choose from.
Backpack Rain Cover Specifications:
Colour: Army green; real-tree camouflage; black.
Material: 210D Nylon (pre-coated waterproofing).
Waterproof level: 3000mm.
Main features: Durable; elastic fit; lightweight; wear resistant.
Size/capacity: 35L; 45L; 55-60L; 80L.