Wapsi Sili Worms are ideal for tying squiggly, squirmy, and wiggly worm patterns. Made from stretchable silicon fibers, this body material elongates up to 200%! Tie with beads, split shot, or pair with weighted flies to target trout, steelhead, bass, and more. Your tying variations with this body material are limited only by your imagination. Imitate a natural food source of the fish world with Wapsi Sili Worms!