Using this 4L Racing Bicycle Frame Bag is a breeze. First, adjust the three Velcro straps to fit your bike frame. You can set them in different positions to make it work well with your top tube bag. Place heavier and bulkier items inside as the design with a lower center of gravity can handle them. You can also put things you need quick access to, like snacks or a small tool. When charging your devices, use the protected cable port. As for maintenance, keep the bag dry after use to maintain its waterproof property. If it gets dirty, you can gently wipe it with a damp cloth. Avoid using harsh chemicals as they may damage the lightweight laminate. Also, when not in use, store it in a cool and dry place to keep its shape and integrity.