Using your Basil Mara 35L double bike bag is a breeze. First, find a suitable spot on your bike for installation. The special recesses make it easy to fit the bag according to your preference. Once installed, you can start filling it up with your groceries, work essentials, or gym gear. When closing the bag, make sure the snap - fasten closure is securely in place to prevent items from falling out during your ride. As for maintenance, since it's made of water - resistant polyester, you can simply wipe it clean with a damp cloth if it gets dirty. Avoid using harsh chemicals as they might damage the material. Also, check the reflective details regularly to ensure they are still visible for your safety on the road.