Using the Mission Workshop Rambler Backpack is a breeze. For the main compartment, you can choose the roll - top mode when you want a more secure and water - tight seal, or the flap - down style for quick access. To expand the capacity, just unzip the expansion section. When putting your laptop or tablet, use the front zippered pocket for 13 - inch devices and the rear roll - top compartment for 17 - inch laptops. To attach accessories, use the Arkiv rails on the shoulder straps. As for maintenance, wipe it down with a damp cloth regularly to keep it clean. Avoid using harsh chemicals. When not in use, store it in a dry place. Remember, this backpack is made in the USA and has a lifetime warranty, so you can count on its long - term performance.