I was given this new thread by the owner of one of my local shops last week and I was surprised that I had never heard of it. I have all of the manufactures catalogs and scour the Internet for all items related to fly fishing and tying and have never seen this. All I can say is that this is pretty thin thread. Actually, it is not thread at all. It is very thin mono, as far as I can tell. I have played around with it a bit, but I have yet to finish tying a fly with it. It takes a very light touch with this. My main problem was I kept nicking it on the hook point and breaking it. I will continue to play with this "new" thread and report back.