Using this top tube bag is a breeze. First, find the right mounting position on your bike's top tube bolt bosses according to your bike and frame size. Then, attach the bag securely. You can store all your frequently used items like your phone, energy bars, or a small tool kit inside. When you want to access your stuff, just use the one - finger zipper puller to open the bag. For charging your devices, simply connect the charger through the protected cable port. As for maintenance, keep the bag clean by wiping it with a damp cloth after use. Avoid using harsh chemicals as they might damage the waterproof coating. If it gets wet, let it dry naturally. Also, make sure not to overstuff the bag to prevent putting too much stress on the zipper and mounting points.