I noticed Lowes and Home Depot seem to stock R-19 UltraTouch denim. I'm thinking of using it for the crawlspace. The reviews I find online are positive. I wonder, has anyone here installed it since this thread was first posted in 2009. Any updates to share? How has it held up for you? Here is an Instructable on it:
Installing Ultra Touch (recycled cotton denim) insulation. Seems pretty much the same process as fiberglass, but without the fiberglass... what's the downside?