I'd check and see what sort of dust sealing has been used. I have a LowLine Canopy and it has High Density Foam around all joining surfaces with the tub and doors. I then added more HD Foam around the tailgate. You'll get more dust in from the tailgate that the canopy!!! Havernt used the Ironman Canopy, but did look at it in the store when i was there, and it looks ok.. the clip system which allows it to be taken off without bolts MAY compromise dust sealing, but I didnt look that closely at it as it wasnt my first chioce of canopy at the time....