This swatch has shown up in this blog before. It was swaved with the steel needle (2.38 mm) and commercial wool 6-ply yarn with a grist of 850 ypp. Gauge is 5.5 to 6 spi or 22 stitches/ 4 inches. It is a firm, but not tight fabric, and certainly not one I would consider tight enough to be weatherproof. In fact, the purpose of this swatch was to prove that it was possible to swave a normal knit fabric.
One of the anonomice says they can knit such fabric on US3 needles (the white bar above.)
Anyone that can do that will need some refreshment afterwards. If anyone can knit such fabric on US3 needles, I will buy them a case of good brandy.
Yes, it is not very good knitting. I was just learning an utterly new technique.