Using this Brompton travel bag is easy. First, unfold the bag and place your Brompton bike inside. Make sure the bike fits well and is secure. When you're ready to move, use the four wheels to roll the bag around. It's much easier than carrying it. For carrying it over your shoulder, adjust the straps for a comfortable fit. As for maintenance, keep the bag clean by wiping it with a damp cloth regularly. Avoid exposing it to sharp objects that could tear the material. When not in use, fold it up and store it in a dry place. And remember, this bag is compatible with all Brompton models, so you don't have to worry about fitting your bike in.