The only mill that I KNOW of that puts a teflon coating on their PV is Marton Mills. It's 11 oz material and is the best quality PV I've seen. I have seen OTHER companies 11 oz PV material and it is very light and flimsy compared to the Teflon coated stuff... the coating gives the material a "stiffer hand".

Also, PLEASE do NOT think that just b/c it's not wool it's automatically PV. There are MANY other Poly blend materials out there that companies use that are not as nice (IMHO) as PV. Many companies use a Poly Acrylic or a Cotton Poly blend.