Although we have previously discussed that boat-tail helmets would be a safety hazard (try doing a shoulder check at 60mph) check out the faired rubber downhill skiing suit! The posture reminds me of a Ninja 250 duck?
If the leather fringe is in the right place it might be lower drag than a plain leather leg or sleeve. It will act something like a flat plate splitter, to damp the "flopping" of the vortices behind the cylindrical section. It's not as good as a rigid flat plate of course, but could have benefits over a smooth cylinder.
I remember The RoadWarrior..To understand who he was, you have to go back to another time..the world was powered by the black fuel & the desert sprouted great cities..Gone now, swept away..two mighty warrior tribes went to war & touched off a blaze which engulfed them all. Without fuel, they were nothing..thundering machines sputtered & stopped..Only those mobile enough to scavenge, brutal enough to pillage would survive. The gangs took over the highways, ready to wage war for a tank of juice