It's regular canvas and then they add a coating on the canvas to make it waterproof. That is what Mr. Vuitton was famous for, his waterproof trunks back in the day.
I don't know about you, but the chicks in my neighborhood (Chicago north shore) are super-snooty, mean, and unfortunately, rich. You can't actually talk about handbags -- you strut your stuff like an egotistical peacock. If I asked a question similar to yours, these chicks would get this nasty look on their faces (like there's dog poo somewhere close by) and proceed to ridicule you. I got that very attitude the first time I visited a Chanel boutique and asked, "Is caviar leather something new this year?"
You're among friends here. This board is such a great place, and for me, the camaraderie here is something I can't get "in real life," in a manner of speaking. You will not be judged.
The fact that it's coated canvas is one of the reasons why I've had such a hard time getting into LV.... I finally broke down and got a cerise sac plat. But I don't know if I'll become hooked...