Lowepro Messenger Factor M Computer Bag for $16.95 shipped. Here is a screenshot for your reference. It fits most 15.4″ laptops. This messenger computer bag has rubber handle and adjustable shoulder strap for multiple carrying options and includes a breathable mesh pad for comfort, along with pleated pockets to organize cords, adapters and other accessories. Others usually have this Lowepro Messenger Factor M Bag for about $24.