SLF is a little bit curled fiber but really little bit and it is flat . It is very similar like polar fiber .But in our opinion, polar fiber is a little bit thicker and stiffer. SFL is thinner and softer than polar fiber.
UNI-Thread is the favorite fine fly-tying thread of fly–tiers all over the world.Noted for being exceedingly strong for its diameter. UNI-Thread is made of continuous polyester filaments, slightly bonded, which ties flat on the hook.
50 yds - 45,72 m