DS has a friend (24) who wants to spend his birthday somewhere different, so he, DS and another lad are going to Kiev, Ukraine for a long weekend. The weather forecast is for blizzards, and temperatures of -10, "feels like -12" with the wind chill. He is going to buy thermal underwear but will he need special clothing? What about boots? Will ordinary work boots and thick socks be OK? Any other advice, please? None of us has been skiing and we have no experience of cold outside the UK.