Using this bag is easy. For bike use, simply attach it to the handlebar with the positive-locking, quick - release bracket. When you're off the bike, buckle the strap around your waist. Put your essentials in the padded main compartment and use the external zip pockets for easy access items. The side straps are handy for attaching a Topeak cell phone bag. Remember, this bag is not waterproof, so use the included rain cover during wet weather. To maintain it, clean it with a damp cloth regularly. Avoid using harsh chemicals as they may damage the bag's material.