BWO Stacker Sparkle Dun

Hook: Tiemco TMC101, size 18 and smaller.
Thread: Olive 8/0 (70 denier).
Trailing shuck: Olive Z-Lon or Antron. Mark the trailing shuck using a brown
 permanent marker.
Abdomen: Tying thread.
Thorax: BWO Super Fine Dubbing or
 olive foam.
Hackle: Medium blue dun.
Making a stacker loop: Form a
 thread loop resembling a dubbing
 loop. Spiral-wrap the hackle up the
 loop a short distance, and then wrap
 the hackle back down the loop. Tie
 off and clip the excess hackle tip. The
 stacker loop should resemble a bottle-
brush. After forming the thorax, stroke
 the hackle barbs away from the hook
    shank, pull the stacker loop over the
 thorax, and tie off.