Note that it’s possible to spin cat hair into yarn. Longer-furred cats are, of course, much easier. but I’ve successfully spun a short length of yarn from my DSH’s with a simple drop spindle by giving it a very hard twist and then doubling the yarn over a few times so the counter-twisted strands keep each other tight. (I think it’s the one piece of string in the house that Harry hasn’t tried to try to chew through.) I’m told that a common trick with shortfurs is to mix their fur with longer fur from other sources,
I’ll never have the patience, but I do like the idea of a catfur sweater. There’s enough fur on my sweatshirt that it’s approaching that state anyway. (“You have cats.” “How did you… Oh.”)