This is a Dunlop microfiber cloth. 80% polyester, 20% polyamide.
JIM DUNLOP 6582 Formula 65 Ultra Glide String Conditioner 60 ml product for
Jim Dunlop Pure Formula 65 - Silicone Free Care Kit - GA60
Dunlop 651SI Formula 65 Cleaner and Polish
Jim Dunlop 01 Formula 65 Fingerboard Cleaner - 4oz
Jim Dunlop 02 Formula 65 Fingerboard Conditioner - 2oz
JIM DUNLOP 654 - Formula 65 Cleaner & Polish | Professional Cleaner for Stringed
