One vendor at the Grey to Green Festival had this unusual insulation material on display. (http://mahoningvalley.info/forum/index.php?action=dlattach;topic=6777.0;attach=3651;image)
It is blue in color because it is made from old blue jeans.
I like it!
Of course that is comming from someone that has owned both a Levi's Gremlin and a Levi's Jeep.