The E-Pack is a top tube-mounted pack that attaches with Velcro loops.150 x 50 x 90mm30gAttaches with Velcro straps600D Cordura NylonPadded sides maintain shapeWater resistantLarge dimensions 150x50x90mm (386 cubic CM)Large Weight 30gramsSmall dimensions 75x40x105 (220 cubic centimeters)Small Weight 15 gramsItem SpecificationsColorGrayTotal Volume24in3