Lencca Quadra &ndash; JET BLACK Multiple Purpose Backpack / Messenger Bag fits Apple MacBook Pro Retina Display 15&rsquo; & 13&rsquo; / MacBook Air 13.3 inch The Quadra excels in design for ultimate versatility. Transforms to different useful covers such as: an overnight messenger bag, brief case, tote, and backpack. Interior has adjustable straps on one side for leptop use. Side contains padded pockets for tablets, cords, small cameras, external hard drives and the like. Rear compartment was designed for keeping folders and documents intact and separate from the rest of the bag.