What is the gray felt meterial I got with my Sony?


When I got my Sony SCD XA-5400ES it came with a roll of sticky back felt. Is this dampening material? Has anyone used this felt inside or out of the SCD player and if you did what did you notice with the sound?
128x128zeal
I am guessing you bought this used and the seller sent this along.

I have unpacked scores of brand new (and used) Sony 5400's and none included any grey felt.
No, I bought it brand new. The felt has a sticky peel off back and my guess is that it's dampening material.
Yes, that is likely what it is but I have never found that included in any Sony XA5400 box I have opened.
Maybe it is for the bottom of the player, to protect your furniture, not damping. It sounds strange to use felt damping with no instructions.