Banjo Brothers large "gas-tank" style top tube bag is the bag you've been looking for. It features 65 cubic inches of storage with a rigid bottom and padded sides so the bag holds its shape and the main compartment zipper and side zipper are easy to use one-handed. Features: Rigid bottom and padded sides Weather-proof zippers Cut-to-fit-straps Reflective piping Specifications: Pack Type: Top Tube Bag Pack Capacity: 1.1L Mount: Hook & Loop Straps Waterproof: Water-Resistant Material: - Dimensions: 7 x 4 x 2.5" (Length x Height x Width) Color: Black Weight: 170g