Wool is a good thing.
Perfect morning today.
Summer base layer, mid-weight, long sleeve jersey, wind vest, knee warmers and roubaix (fleece-lined) cycling shorts.
Got to try out the new Belgian shoe covers too. To answer your question, Belgian shoe covers are basically really big socks with a very durable weave for the bottom. They’re lovely for dry rides in the 40s and 50s.

As is the norm, we’ll all likely be riding home with at least some of what we wore in our bags, rather than on our bods. Should be a lovely afternoon for the long way home.
Enjoy it!
Pete