Saddlemen Expandable Sport Luggage Features Made of molded semi-rigid 600-denier SaddleTuff and foam shell Unique water-resistant zippers make these bags great companions in nasty weather Universal and adjustable mounting straps for easy attachment over or under the rear seat or cowl of most bikes Nylon stabilizing straps secure bags to a turn signal, bungee hook or frame tube Saddlebags formed shell opens completely on three sides with a single zipper Tail Bag opens on top and also has two side pouches Both saddlebags and Tail Bag feature internal mesh pockets, zippered expansion and stylish 3-D accents Tail Bag also features a deployable helmet cargo net Saddlebags and Tail Bag are designed to install together or individually Sizes Standard Sport Saddlebags - 14.5 L x 8.5 T x 6 D (expands to 8 D) XL Sport Saddlebags - 17 L x 10 T x 6 D (expands to 8 D) Tail Bag - 15 L x 16.5 W x 8 T (expands to 20 W)