Quick D.O.P.E. Data Management Card System, by Quick-D.O.P.E.
The Quick Dope card system is completely waterproof. It Velcros right to the side of your gun and comes with 3 large white cards. You can use Dry-erase, Wet-erase, or for the wet days you can write on it with a pencil and it won't wash off without rubbing it or an eraser. Extra cards can be purchased in sets of 3. The large white cards attach using waterproof and very strong plastic Dual Lock. Finish a stage, remove that card, and stick on the next stages card. It's as easy as that!