The Lagos 15L Hydration Pack provides lightweight storage and convenient hydration for time on the trail. Designed with a variety of pockets and compartments for your gear and a 2.5L reservoir for your H2O. Ventilated & breathable back panel and waist belt wings Custom 2.5L Hydrapak™ Shape Loc Reservoir included Dedicated reservoir hanger in hydration compartment Magnetic hydration tube attachment on left waist belt Exterior stretch mesh bottle pockets Exterior zippered organizer pocket Interior slip pockets and key clip for organization Front panel daisy chain for bike light attachment Top grab handle Main: 100% recycled 210D ripstop nylon with PU backer Lining: 100% recycled ripstop polyester 20 x 10 x 8 in (50 x 25 x 20cm) 1 lb 7 oz (620g) *NOTE* last picture is a stock picture of same backpack but in a different color, used for reference of size on person.