Using the Evoc Seat Bag Tour is a breeze. Just unzip the water - resistant zipper, place your multitool and spare MTB tube inside (if it's the L size), and zip it back up. Then, attach it to your bike's seatpost. When riding, make sure the bag is securely fastened to avoid it moving around. As for maintenance, if it gets dirty, use a mild soap and a soft cloth to gently clean it. Avoid using harsh chemicals as they may damage the water - repellent material. After cleaning, let it air dry completely before using it again. Check the zipper regularly to ensure it's working smoothly, and if there are any signs of wear on the hypalon front, it's a good idea to have it checked or replaced.