Shoot me an email or give me a call with any questions. I have been very open and given the best descriptions I can of these kilts a couple of times here on Xmarks.
The link posted above is one of the better discussions.
They are certainly a mixed PV/Acetate fabric. They feel slightly less than 16 oz. It is not as fine as the true/pure PV that is used by many of the makers on the board, USA Kilts and others, but does make a fine, low cost kilt.
Everyone that has seen and purchased them has been happy, for what they are. They are not a replacement for a true wool tank, but are well made and hold together rather well (and you won't have a heart attck if it gets spilled on, muddy, or the like).
I can be reached directly at the store via phone or email,
Brad Hutchins
The Kilted Nation
brad@kiltednation.com
703-330-7072