The ortlieb hi visibility velocity backpack is a highly reflective radiant backpack thatrsquos ideal for the early morning or late night commuter the compact daypack features high visibility and safety in traffic ideal for the cyclist featuring pu laminated cordura fabric is interwoven with a highly reflective yarn in the dark the entire backpack is turned into a reflector when hit by headlights thus cyclists are being noticed considerably earlier this ortlieb backpack has a volume of 2