The ortlieb velocity high visibility 20l backpack high visibility is so important to us at ortlieb because it is a matter of safety both the waterproof polyurethane coated cordura fabric in neon yellow and the black fabric parts of this bag are densely interwoven with high luminosity reflective yarn this composition turns the entire bag into an eminently visible reflector when it is picked up in the headlights of passing cars with its 24 liter payload this versatile daypack is just t