I'm sure his herring fly Yak, but I'm not sure the other bodies are e-z braid. I got some word that the body mighy be flexicord. If it is the latter, I don't know where to find it.
For identification purposes I'm attaching an image of the flies.
I asked the man himself at the Wilmington show,he said it was wig hair and the heads are craft foam ,similar to Blado's crease fly.I tied a few up last year for the fall bunker run using yak hair and angel hair ,they were very effective.