Rubber legs have found their way into numerous fly patterns and their application nowadays reaches far beyond the likes of 'Chernobyl Ants' or big stonefly nymphs. Not very suprising, given the fact that theses soft and highly mobile rubber strands imitate legs better than any other material around. Even streamers and poppers benefit from the lively underwater action rubber legs unfold during line strips and pauses.
Wapsi Round Rubber has a round crossection which beyond durability also adds more mobility compared to flat rubber legs. Also suitable for tying segmented fly bodies.