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If you spend a lot of time outdoors, biking, hiking or just walking to and fro, a backpack with a variety of pocket compartments can be an essential accessory to bring along when you have a bunch of things to carry. Laptops and tablets, cell phones, MP3 players, reading materials, keys, water bottles, and even a change of clothes can all be carried comfortably on your back, leaving your hands free to do other things.
Backpack with cooler pocket compartment:
Pictured above: Backpack with cooler pocket compartment examples