Today, I was talking to my wife about this felt business. She does professional sewing. She told me that the best felt is made of wool, but even synthetics can be good. She then showed me her box that contained her silverware. Yep, it's felt lined. Then she went further and told me about a cloth called silvertex or also known as silver cloth. This is a black cotton cloth coated with a substance to help prevent tarnishing. You use it to wrap your silverware with. I ask her would it work for wrapping micrometers and other things like that. She was not sure, but did not see why not. I ask her where can you get it, She thought a fabric store like Joanns. Looks like another test coming.