>>...and wear socks in sandals (though I’m not quite sure what’s so funny about this...
If the socks are made of some kind of wool, it's spectacularly comfortable - and great for your feet. The wool wicks any perspiration away so your feet stay dry and cozy. And even if you accidentally step in a deep puddle, wet wool will continue to insulate.
The only downside is that some people will laugh. Not me, though...