420D NYLON TAFFETA CAPACITY:50+10L DURFLEX BUCKLE, YKK ZIPPER, SINGKEE RIBBON 1. A LOT OF COMPARTMENT AND INNER POCKETS2. MESH POCKETS AND ADJUSTABLE COMPRESSION STRAPS ON BOTH SIDES3. 3D DIMENSIONAL CUTTING4. COMFORTABLE BACK PANEL WITH AIRFLOW MESH CUSHION PH5401 backpack