For sound properties, envionmentally friendly blue jean batting seems to be
a good idea for studios and for homes in general. Regular R values can be
purchased, no fiberglass itchiness, no gloves or breathing filters required
for installation. It's made from the leftovers of blue jean manufacture.

Has anyone here thought of or used this product?

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Roger W. Norman
SirMusic Studio
http://blogs.salon.com/0004478/