Using these zip sacks is a breeze. Just unzip, put your items inside, and zip it up. They're great for storing clothes, shoes, or small gear during camping or travel. When packing, try to arrange your items neatly to make the most of the space. As for maintenance, simply wipe them down with a damp cloth if they get dirty. Avoid using harsh chemicals as they might damage the silicon coating and the PU backing. When not in use, store them in a dry place. Don't overstuff the sacks, especially if you're using the 10L model as a shoe bag, to prevent the zipper from getting stuck or damaged.