The Crumpler Rampaging Mob is a secure streamlined commuter laptop backpack. Designed to carry on long commutes and bike rides. Lightweight design, weather resistant materials and hidden away pocketing. Features adjustable harness system, front and back saftey reflectors, side entry into the main compartment, hidden pockets for valuables and a huge side pocket perfect for a water bottle. All carry points are padded and durable.