I've never tried to see the floatability of the fly prior to trimming the hair. My guess is that the fly would eventually waterlog and sink. Prior to trimming, the eyes aren't even visible behind the deer hair......an untrimmed fly looks like an albino muskrat that's being electroshocked. :eyecrazy:
This fly doesn't get down in a hurry, and that's why I don't use it in the salt. But for pike in shallow water, it falls at a fairly natural and seemingly helpless rate between strips.