There are some essential components to every good backpack. The material the pack is made of should be designed for outdoor use. Canvas and nylon are the two most often used materials for backpacks. Canvas is more durable, while nylon is lighter in weight. If the backpack is going to be used for a child, the nylon bags will be easier for them to carry. Comfort is also a consideration when looking for a quality backpack. Shoulder straps should come with adjustable buckles as well as padding. The padding will help relieve the strain of carrying the pack for long periods of time.
A high quality backpack should also come with assorted compartments. In addition to the main internal compartment, it is helpful to have exterior pockets for accessing often used items. A side pocket is often designed to hold a water bottle so it is easier to access when hiking or climbing. There are a number of specially designed backpacks which come with outer straps designed to hold skateboards or fishing gear. Backpacks can also have open mesh areas to allow air to circulate inside the main compartment, which is good when using the bag to hold wet swim suits and towels.