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.
Catgut is a great fly tying material and flies tied with a catgut look very realistic.
Colour : Green
50cm/bagSize L is for hooks #8 and #10Size M is for hooks #12 and #14Size S is for hooks #14 and #16Size XS is for hooks #16 and #20L=0.7mmM=0.5mmS=0.3mmXS=0.2mm