Using this handlebar bag is easy. First, make sure you have the right mount (E241, E185, E225, E207, or E226) as it's sold separately. Attach the bag to the handlebar using the mount. You can put your valuables like wallets and keys in the zippered inside pocket. For your phone, GPS, or maps, use the transparent flap compartment. You can even operate your touchscreen device through the cover. If you want to carry the bag off the bike, use the detachable shoulder strap. When it comes to maintenance, simply wipe the bag with a damp cloth if it gets dirty. Since it's made of waterproof polyester, it can handle some rain, but try not to let it soak for too long. And always keep it in a dry place when not in use.