After Maximum Compression? Follow These Steps
1. Put items in the bag
2. Fully close the zip
3. Undo the one way valve
4. Press down on the bag to remove as much as air as possible (you can also kneel on the bag or lean on it to compress even further)
5. Use the pump to suck out any remaining air (if required)
6. Close the one way valve
7. Go Adventure.