Explorer U.S. Military Level 3 Tactical Backpack, Medium Polyester 100% Imported Polyester 100%, Side and Top cinched down gear security straps Huge expandable main compartment - with interior meshed enclosure for small gear Large middle compartment - Zippered interior small gear pouches Two Medium and small compartments for smaller gear Numerous MOLLE Loops and removable adjustable Padded Shoulder Straps and Waist Belt