Using this laundry sack is a breeze. First, simply open the drawstring cinch closure and put your dirty clothes inside. When you're on the move, you can use the drawstring to close it up tight, which will block the odors and let you carry it over your shoulder easily. If you need to store small items like keys or cards, use the front zippered pocket. To pack it away, just stuff it into its front zippered pocket. As for maintenance, since it's water - resistant and made of 100% Polyester Ripstop, it only needs a gentle hand - wash. Don't put it in the washing machine as it may damage the material. Also, remember that the actual size and capacity might be a bit different from the calculated ones due to sewing tolerances, but it won't affect its functionality.