I've worked construction for years in all weather conditions. Long johns and a matching long sleeves undershirt is a must for a day long exposure. The real secret is the effective wind break barrier on top of it all- the more light weight the better. The cold weather itself is not much a a problem, it's the icy wind that will get you. DriWear 100% polyester for long johns/long undershirt combo- Mark's still might be selling it and an ordinary water proof track suit for the windbreaker.

