It seems that every auto TV show I've seen puts jute under the carpeting. Can't seem to find any at the typical locales, (Home Depot, Lowe's, etc.) The do have carpet underlayment made of foam, some of the more expensive stuff has Scotchguard treatment.
Is there a reason that you can't use this newere foam stuff? Is the oldschool cotton stuff really better? Let me know what you think.