I will not try to hide the fact that you’ll need 20/20 vision to spot the fly in dusk or bad light. But fished in good light condition, it should not be any problems to spot the fly in the film (it will float low).
As you’ll see it is a traditional sparkle dun pattern, only that the Comparadun wing (or the paradun wing) is switched with the paraloop hackle. The fly will float well into the film, and the fish will see the entire profile of the abdomen. Great for fish and for those of us who believe that Swisher/Richards were right – that a well presented body is all important when it comes to trigger the fish to take the fly.
Intuitively I would use a grizzly paraloop hackle, but experience suggest that a reddsh brown/ginger hackle serves as an additional trigger.