Using these Surly Big Dummy Bags is easy. First, make sure your bike has a Dummy - Style rail system. Attach the bags securely to the rail system. You can adjust the expandable side panels according to your cargo needs. If you have a lot of items, let the panels lie flat. For smaller loads, cinch them up. When it comes to cleaning, just use water and a mild detergent. The three stainless - steel drainage ports will help the bags dry quickly. Be careful not to overload the bags as it may affect the bike's balance. Store the bags in a dry place when not in use to keep them in good condition. Since the materials are sustainably produced, you're also doing your part for the environment by using these bags.