Don't forget about the moth problem:( http://www.wikihow.com/Keep-Wool-Clothing-Safe-From-Moths ). If you are going to use is as damping, in an open system or building a transmission line; bonded dacron(polyester fiberfill) works great, and doesn't need to be treated. ie:( http://www.foambymail.com/DACRON/polyester-fiberfill.html ) ( http://www.ebay.com/itm/NEW-Bonded-Dacron-3-4-oz-54-inch-wide-by-the-YARD-/230609037713 )