The Ortlieb Messenger-Bag is a sturdy urban bag popular with couriers and others who frequently cycle. It is made from water-resistant polyester fabric, has a slim design, and features a roll-top closure that adjusts to the height of the load. The ventilated foam base, waist belt and chest strap help the bag fit comfortably against the body. Reflective strips and side reflectors improve visibility on the road, especially in darkness and poor weather. A separately available laptop compartment can be added to models from 2023 onwards to protect a laptop on uneven roads.