20L PACK WITH ADVANCED MATERIALS Our AP Series Sanction rucksack features the Arkiv(R) closure system and is available in three advanced fabric variations: HT500, American-made 10 oz. waxed canvas, and MultiCam-Black Cordura. All Mission Workshop backpacks allow for the addition of single rail Arkiv(R) accessories on both shoulder straps. - Laptop Storage: Zippered pocket fits most 15" laptops and tablets - 4 Internal weatherproof pockets - 1 External Compartment - Internal Frame Sheet - Extremely durable - Optional Waist Belt - Sold Separately - Made in the USA SPECIFICATIONS - External Dimensions : 12" x 18" x 5" - Internal Volume : 1,250 cu.in. (20 L) - Weight (Empty) : 2.6 lbs (1.2 kg) - Body Fabric : HT500, Waxed Canvas, or MultiCam-Black Cordura