MOUNTAINTOP Lightweight Daypack 25L 25L (1,500cu in) foldable daypack for excursions FabricRipstop Nylon; Water-resistant Collapsible, small and packable enough to put into the inner pocket The self-packing pocket (HLW:7.5*7.1*3.5 inches) becomes a valuables pocket when the daypack mode is deployed Lightweight design, only 0.39 pounds