Hanks Surplus Military Style Molle Travel Hiking Camping Day Backpack Adjustable contour padded shoulder straps with D-Ring for equipment attachment. Adjustable sternum strap with safety whistle. Quick release buckles on all straps. Four external side compression straps. Reinforced hip area backing with waist strap storage area. Two main compartments with clam shell zipper opening. Main compartment includes removable stiffener, hydration pocket and two zipper mesh pockets. Outer compartment includes two zipper mesh pockets. Hydration pocket with two top Velcro closure exit ports. Two removable tube clips to secure hydration tube. Hydration pocket can fit one 3L water bladder. Heavy duty top carry and drag handle. Top zipper for easier access to main compartment. Large paracord zipper pulls for easier pull with gloves and mittens on. Heavy duty YKK zippers. Rugged 500D CORDURA nylon fabric. Medium 26.5 Liter load capacity or 1,620 cubic inches. Approximate Size: 18" Length x 10" Width x 9" Deep. Total empty weight: 2 lbs 14 oz.