On a side note, when Dupont was about to stop making Z-Lon, he bought all of the remaining inventory (source: Tim Flagler). So, any Z-Lon that you buy today has passed through Blue Ribbon.
I love that material and like it in white (link here) to make wing buds for midge patterns. It has fine fibers and shimmers slightly. Antron is very different, IMO.
Here is a great video showing how to tie soft hackles for small flies. It’s very convenient and also is helpful if you don’t have small feathers on hand.
It is always fun to watch a master fly tier in action.