Using the Acepac MkIII Bar Drybag is simple. If you have the Bar Harness, use the lightweight webbing chain, velcro, and plastic hooks to attach the drybag to it. If not, you can use it on its own to keep your equipment dry. When using it with a backpack, attach the chain at the bottom of the bag to the side compression straps. This helps when you're on uneven ground and can also be used to carry items like tent poles outside the bag. Just make sure to secure them well so they don't slip. As for maintenance, after each use, dry the bag thoroughly to prevent mold. Store it in a cool, dry place. Avoid sharp objects that could tear the Nylon Robic material. And remember, the Bar Harness is not included with the drybag.