The Bannatyne Dri-Flow moisture system provides straightforward drone moisture control. The tubes are flexible, but not floppy. A screen fitted at the end of each tube allows air to flow through the desiccant as it travels to your drone reeds. The tubes can be hemped and fitted into the drone stocks from inside the bag or installed with the rubber cups provided. Both methods allow for easy removal of the system after playing to allow the desiccant to dry and to prevent the pipes from drying out.