I just checked Wildboar's website and they've posted pic's of one of their RTT's deployed. Although there is no mention of what material the tent is made of, it looks like it's nylon rather than canvas.
I have the Wild Boar fast back top and their roof rack. Both arrived damaged. They were non-responsive to my requests. Unfortunately, I won't be sending any more of my money their way, nor can I recommend them to anyone else.
