Using your Serfas Phone Top Tube Bag is super easy. First, use the 3 - strap mounting system to attach the bag to the top tube of your bike. Make sure the straps are tight so the bag stays in place during your ride. You can keep your phone inside the main part of the bag and use it through the touch - screen capable cover. For other items like a repair kit, replacement tube, or snacks, put them in the 1.72 - liter zippered pocket.
When it comes to maintenance, if the cover gets dirty or damaged, you can replace it (just remember it's sold separately). Keep the bag dry and clean. If it gets wet, let it dry completely before using it again. And when you're not using the bag, store it in a cool, dry place. Also, be careful not to overstuff the bag as it might affect its performance and the stability on your bike.