Wenzel Daypacker Day Back Pack (Grey/Blue) 21 inch x 13 inch x 9 inch size, with 2000 cu. In. capacity Back panel - mesh over molded ventilated foam with integrated air channels 3 large main compartments and internal organizer in front pocket Webbed carry handle, dual mesh water bottle pockets, hiking pole straps and side compression straps keep you together and organized Hydration compatible (reservoir not included)