Hold its shape in the water.
Just add H2o Polar Fibre, a super, soft, pre-tapered synthetic fur that will give any pattern incredible action in the water. The Polar Fibre is a life like material for bait fish imitations, streamers and various attractor patterns. Great when tying with epoxies, and can be easily marked with indelible marking pens for a more realistic fish fooling presentation. Polar fibre will hold its shape in the water, eliminating the pulsing effect that you get with flies tied with natural materials. It is virtually indestructible and dries quickly.