Fuzzy White Stuff

In several pictures of the interior of Cutty Cabins I see fuzzy white stuff. Looks like fake fur. Must be for sound deadening. Is that factory original? My 78 has it and it is nasty dirty and must be replacement? What are your suggestions for a replacement?
For those of you who have redone your cabin. How did you clean off all the glue? Also, how do you keep it from falling off the celing? Guess I could roll the boat over, maybe not.