Wow. I am tempted by this, if only for nostalgia. Not sure I would ever actually use them. I had a pair of these BITD. They were my first cycling shoes, purchased slightly used from a local racer.
The soles are wooden. That's the Duegi thing, very stiff. Not everyone liked it. The outsole is laminated with leather so it isn't immediately obvious.
46 is generally about an 11.6 US, maybe a bit bigger than US 11 1/2. It can vary from manufacturer to manufacturer. Most shoe size conversion charts on the interwebs are shockingly wrong.