Here’s a nicely produced video of a guy riding a flevo (I think?) to work in Holland (I think?). The velomobile has a semi open cockpit that you can see at the start of the video. I opted for a closed cockpit for a bit more protection, which this rider may have wanted also by the end of the video when it starts raining.
I saw the video on another blog I read, The Lazy Rondonneur.