Dynamat or Fatmat??

If it doesnt create a problem with the carpet install. Its only about 1/8" thick if I remember right (its boxed up in the shed) and comes in a few different pieces. I think front, back, and hump.
I got a great deal on it on Ebay... and figured if it keeps more of the heat out and cut some of the sound- the better!
I have a convertible with no A/C! so the top/windows are down more than not. I get enough heat and rumble as it is.
Ill let you know how it works out.