How to use: Simply unzip the large double - zipped opening on the main compartment to put in or take out your stuff. You can use the front zipped pocket for small items like keys or cards. Adjust the shoulder straps to fit your comfort. Carrying by the double carry straps is also an option. Note: Don't overstuff the backpack to avoid damage to the zippers or the structure. When cleaning, just wipe it with a damp cloth as it's made of wipe - clean polyester. Store it in a dry place when not in use to keep it in good condition.