The light pack 25 is the lightest of all the ortlieb backpacks with a 25l payload and a weight of only 290 grams the light pack 25 offers an optimal weight to volume ratio and distinguishes itself in terms of its purist design its proven roll closure and its lightweight air permeable straps and when its not needed the minimalist shrinks down and waits in its practical mesh bag for its next mission fabric ps21 height 47cm width 26cm depth 15cm volume 25l weight 290g e