Hump Unisex Big Rucsac Cover Safety Yellow 50L has the following specifications The Big HUMP is a perfect waterproof and hi-viz rucksack or pannier cover for commuters and riders who want to keep their gear safe and dry while on the bike >>>>> BUY NOW <<<<< Safety yellow day-glo fabric feature highly reflective chevron prints and stripes to give you superb daytime and night time visibility The Package doubles as a reusable waterproof sleeve that clips into the inside of the cover The mesh pocket is the ideal home for an LED light to further strengthen your visibility Elastic binding ensures a great fit to most bags The elasticated snap buckle fasteners ensure that the Hump fits snugly over your backpack or pannier bag for a custom fit tight >>>>> BUY NOW <<<<<