The Volvo S60 is our #1 producing fly.  A heavily weighted nymph pattern combining the effectiveness of the movement of a soft hackle. The oversized Hot Pink Tungsten bead and lead wire drops quickly while the sparse buggy profile and flowing fibers create constant lifelike motion during the drift.  The biot wings create an additional trigger point, giving trout one more reason to commit to the fly. 
Tied on a size 12 Jig hook with a 4.6mm Tungsten bead.