Depends on the kinds of socks you wear, in my experience. I got a little bit warmer wearing knee-high compression socks, but the trade off (no swelling in my feet, no pain) was well worth the slightly...
You don't *have* to have a prescription for that kind, though. Personally, I think that the 20+ mmHg compression socks are the best. After a 12 hour shift in those, I'm still doing great. I'm looking...