The stuff that the Gold Brothers markets MIGHT be a polyester blend, and it might have viscose/rayon in it. Maybe. It must also be said that for WHAT THEY ARE, those kilts are fine.

But their material is not as finely woven as the Marton Mills, nor is it as comfortable.

Stillwaters kilts are not polyester-viscose. The Frugal corners kilts are not poyester viscose.

The answer is that there IS NO high-quality 16 ounce polyester-viscose tartan currently available.