Ortlieb Handlebar-Pack Flex – 15L Black Matte. The Ortlieb Handlebar Pack-Flex waterproof luggage roll features a Mounting-Set interface and roll closures on both sides for easy access. Made from PU-coated nylon fabric it includes a valve with a grip loop for compressing the pack volume. Additionally it has a hook for attaching an Accessory-Pack and an elastic cord on the outside for securing extra equipment.