[johnwilliamson062]

Pond, I read up on it from a reliable scientific source, wikipedia, and there are some claims it will work.

Thinking about sound absorbtion, cotton acts much differently than steel. Steel wool takes you closer to cotton, but it seems to me like it would not absorb much sound at all. I was thinking paper from a shredder, but that has obvious problems.

Packing materials such as metal mesh, steel wool or metal washers may be used to fill the chambers and further dissipate and cool the gases. These are somewhat more effective than empty chambers, but less effective than wet designs.[2] Metal mesh, if properly used, may last for hundreds or thousands of shots of spaced semi-automatic fire, however steel wool usually degrades within ten shots with stainless wool lasting longer than regular steel wool. Like wipes, packing materials are rarely found in modern suppressors.

I would also worry about fibers getting in the path of the bullet and causing damage to the suppressor.