Osprey's Flap Jack Day Pack is designed to keep you organized for the whole day. Features include: reflective graphics enhance low light visibility; full-length side zippered pocket; spacer mesh harness for comfort; ridged mesh covered foam back panel allow airflow; removable 25mm hip belt adjusts to the load. The fabric is 600D Polyspun. VOLUME: O/S 1282 in3 / 21 l DIMENSIONS: 19h x 13w x 9d in. WEIGHT: 2.01 LBS. Twilight Blue pack is decorated with the WSJ 2019 logo.