Sharee, this is a Durarig 4.8m x 4.8m tarp, it actually goes over the roof and sits out about 800mm on the drivers side. It has aluminum telescopic poles under the roof rack that extend out so I have coverage down the drivers side as well, unfortunately i don't see it working with a RTT. You could always cut a tarp into an L shape, get acanvas sewer to put in some rope and run sail track down the side and across the back, slide the tarp in and bingo, you have the poor mans foxwing, set up would not take any longer and about a 15th of the price.