its not really dynamat, its "black mat". its supposedly better (thicker) than dynamat but i dont know about that, but it has a money back guarantee so its all good. it was only 110 shipped on ebay for 50 square feet. the 50 feet should do the entire back of my car from about where the console lid ends. i will probably buy another 50 square feet and do the doors and floor and front fenders. this stuff is really easy to work with. good luck!