Double hump waterproof rucksack cover a convenient take on the legendary backpack cover the double hump has a seam sealed external zipper pocket to keep your essentials to hand constructed from fully waterproof fabric with taped seams the double hump keeps the contents of your bag dry safety yellow day glo fabric features highly reflective chevron prints and stripes to give you superb daytime and night time visibility the packaging doubles up as a reusable waterproof sleeve that clips into the