Backpacks offer a hands-free method of transporting miscellaneous items for such adventures as taking books and a computer to school, extra clothes and water on a hike, or snacks and a blanket to the beach. Features like in-line skate wheels and a retractable handle give the back a repose when hauling extra heavy loads. The main compartment is designed to hold larger items, while multiple interior and exterior pockets store smaller objects. Internal compression straps keep contents secure and an adjustable tow strap offers the ability to fasten two or more bags together. Durable, water repellent fabrics like nylon, polyester, canvas and leather ensure that possessions remain dry and clean. There is an overwhelming amount of choices when it comes to colors. Hunters may opt for a camouflage print to blend in with the surroundings, while college students might select a bag with the school colors. When not in use, backpacks roll up or go flat for space-saving storage.