Using your Tatonka dry sack is easy. First, put your items inside the sack. Then, roll down the top of the sack a few times to remove as much air as possible and create a tight seal. Finally, you can store your sack in your backpack or use it however you need. When it comes to maintenance, after each use, if the sack is wet, dry it in a well - ventilated area. Avoid using harsh chemicals to clean it, as this could damage the material. If there are any small dirt spots, just use a mild soap and water to gently clean them. Also, when storing the sack for a long time, make sure it's completely dry and store it in a cool, dry place. And always be careful not to put sharp objects inside the sack, as they could puncture the material.