The zippo wicks have a cotton shell that will burn, the inner wick is silica or fiberglass, not sure which, however, I tested it and it does not burn. Thats why the instructions say to burn off the cotton shell first. If you want another source for wicking material you can use an old ce2 cartomizer and take the wicking from that or heavensgifts.com sells replacement wicks under their do it yourself section on their web page.