The AP Series of our classic Fitzroy rucksack features our ArkivA(R) closure system and is available in four unique shell fabrics: X-PacA(R) VX21, HT500 Nylon, Waxed Canvas Cotton, and MultiCam-Black Cordura. The Fitzroy is a large weatherproof rucksack that is ideal for day to day use when larger loads are needed or as a carry-on during travel. A large zippered internal pouch is great for laptops with five other pockets and compartments to round out this versatile pack.With Arkiv rails on the shoulder harness, the Fitzroy also accommodates single rail ArkivA(R) accessories such as the cell and utility pouch. Additional features include Aquaguard YKK zippers and an internal frame sheet for optimal weight distribution.