You can use just about any material that is use to make thread, I perfer to use "Mercerized Cotton". There are many people who are into furled leader constructions and design.

Actually I have somewhat of a fan base on another site that is just crazy over my Big Furled Leader Formula, that I was going to write about for FAOL, before I was booted the the late James Castwell over some miss understandings between us. He is no longer here, so I came back. Try the url connection below, there is tons of information there, all about furled leaders.

http://www.furledleaders.co.uk/