Ortliebs velo shopper is a spacious 18 litre shopping bag with flap and magnetic closure made from a specially developed waterproof abrasion resistant nylon fabric according to the saying form follows function the magnetic closure is easily opened with one hand the proven ql21 system securely fixes the bag to the bike the velo shopper remains stable and upright thanks to an inner stiffener and base feet off the rack a handle and removable padded shoulder strap are used fabric pd42rps