Laptop bags provide a safe and convenient way to transport a computer to school, work or on an extended trip. Not only do they shield expensive equipment from inclement weather conditions, but they also provide a padded cushion against abrasion during rough journeys. Although there are various sizes and styles, most have an adjustable shoulder strap and clutch handles. Some other models provide wheels and a retractable handle, for extra heavy loads or long walks through an airport terminal. Leather, suede, canvas and nylon are the most common materials used due to their durability and facade. Business people tend to stick with neutral shades of black, brown and gray, while students may select more creative models. Laptop bags also allow the user keep track of additional accessories, such as a wireless mouse, headset, disks, charger and extra battery, thanks to multiple interior and exterior compartments. Divided sections keep reference materials, like files and notepads, in order and within easy reach.