Giorgio Benecchi ‘XXF’ 12/0 Ultrafine Thread (70 denier Polyester, Multistrand flat crimped, 100 meter spool)
*This is the finest construction thread available on the market that is a true 12/0 and consists of parallel and crimped microfibers. The tensile strength (gr. 450) allows you to use it with safety in construction. Easily tie all small and medium size flies. The crimping of the fibers provides a good grip, so it is not waxed.