Using the Hikobike waterproof pannier bag is easy. First, open the roll - up top to put your items inside. The large 23L capacity can hold quite a lot. Then, close the top tightly to ensure it's waterproof. Attach the bag to your bike carrier using the quick - release clips. You can adjust the side - to - side clips to fit carriers with tube diameters between 8mm and 14mm. You can also carry the bag by the handle strap or over your shoulder. When it comes to maintenance, clean the bag with a mild soap and water after use. Let it dry completely before storing. Avoid using sharp objects near the bag to prevent damage. Also, make sure to store it in a dry place to keep it in good condition.