I believe Lagomarsino out of Argentina uses nutria but I am not sure if they have a NA distributor.
http://www.lagomarsino-hats.com.ar/
JWalls, Looks super!
I made this hat from an old Nutria body I had in stock.
I know Stratton uses nutria in at least some of the law enforcement campaign hats they make. I'm not aware of anybody else using it.
HiA master hatter I have bought from told me that nutria is hard to work with.
I believe Lagomarsino out of Argentina uses nutria but I am not sure if they have a NA distributor.
http://www.lagomarsino-hats.com.ar/
JWalls, Looks super!
The Hat Guys out of Oakland used to sell Lagomarsino, but do not appear to have them now.
I bought 2 Lagomarsinos while in Argentina, but they tapered so badly, I ended up giving them to Goodwill. I don't know if it was the fur itself, or the process. They were both listed as "Nutria Quaility".
I recall somebody, maybe Matt Deckard, has a ultra-lightweight from Optimo that is nutria/beaver blend.
FEPSA do not make Nutria felts