Using this Serfas pannier bag is easy. First, attach it to your bike's rear carrier rack. If you want more storage, you can attach another one on the other side. To access your items, simply open the roll - top closure. When it's time to take the bag off your bike, use the webbed nylon top carry loop. You can then use the shoulder strap to carry it like a book bag. As for maintenance, clean it with a damp cloth when it gets dirty. Make sure to keep it dry to maintain its water - resistant properties. Also, check the Velcro, buckle, and attachment points regularly to ensure they're in good condition. When using the safety light attachment loop, make sure the light is securely fastened. And don't over - load the bag to avoid damaging the reinforced edges and stiffened rear panel.