The deluxe hump sets the benchmark for all backpack covers constructed from fully waterproof fabric with taped seams the deluxe hump keeps the contents of your bag dry the day glo fabrics feature 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 inside of the cover the mesh pocket is the ideal home for an led light to further strengthen your visibility elast