I used a felt bass pick when I started decades ago. It was like the uke picks but twice as thick. That was an old school thing even back then. With flats it took away the clunk click that a guitar pick gave you, but what a freaking mess. Felt fuzzy dust everywhere. It was fun that it looked like a rug pad - gray and colored specks in it. Blah.
I like my Mastersounds lps with Monk on them.