Using this dry cylinder bag is easy. First, open the roll - top closure and put your items inside. Then, roll down the top a few times and secure it tightly. You can carry it by the detachable shoulder strap or attach it to other gear using the Double D - Ring. When it comes to maintenance, rinse the bag with clean water after use, especially if it's been in saltwater. Let it dry completely before storing it. Avoid using sharp objects near the bag to prevent tearing. And always check the welded seams for any signs of wear or damage.