Since they are light and airy, they definitely need to be paired with heavier fabrics like this gray wool coat. (stylemba.com)
These days they are using a kind of heavy fabric for dresses, I don't know what it's called. (eloquii.com)
I question their suitability for heavy fabrics, but for the two layers of medium weight upholstery poly that I was working with.... (acolourfulcanvas.com)