One Too Many
This is not my experience at all. I don't have one of those devices that measures thickness, but I'll bet my life that mine is more than 1.2 mm. I have many jackets that are listed at 1.2 mm and my RC Herc is significantly thicker.It’s like a heavy weight CXl jacket that is wearable from day one without any break in. The Herc is just the normal 1.2mm Shinki. The highwayman is at least 1.4 1.5mm.
I've also owned mine for a decently long time (2019) and it's barley broken in...and I wear it a lot and I put real wear on my jackets. It's also one of the most restrictive patterns I've ever owned. Almost like a straight jacket.