4 zip compartments for total organization Accommodates hydration pouch Main compartment with 2 mesh pockets and laptop sleeve Second compartment with inner organizer Outer bottom compartment with organizer Padded back with hook/loop back pouch 4 side compression straps 2 bottom compression straps 2 way adjustable shoulder straps Adjustable waist and sternum straps MOLLE outer and sides Loop chain on front compartment Dimensions: 13” x 11.5” x 19” (33 x 29 x 48 cm) Capacity: 45 L