Using the Birzman Packman Saddle Pack is easy. First, use the Velcro fasteners to attach the pack to the seat post firmly. Then, you can adjust the side compression straps according to how much you've packed to keep the pack stable and reduce rattling. When packing, open the roll - top waterproof carrier and put your items inside. Roll down the top to close it and protect your stuff from water. As for maintenance, after a ride, wipe the pack down with a damp cloth to keep it clean. Make sure to check the Velcro fasteners and straps regularly for any signs of wear. If you notice any damage, it's best to get it repaired or replaced. Also, store the pack in a dry place when not in use.