In reply to David Bennett:
Who cares. Anyone who knows what they are will either know what you're doing or are judgemental tw*ts who probably judge everybody.
I tend to get the opposite, I run down from the hills in winter wearing a vest and minimal shoes and get funny looks from the folks wearing hundreds of pounds of outdoor gear to walk down the canal for a pub lunch.
I figure if they're more comfortable being covered and layered then good for them. If they can't understand I run warm then who cares.