One last post about clothing.

Mittens are always warmer than gloves made from the same materials.
Skidoo mitts are very warm and are usually pretty wind and waterproof. A lot of them are made with removable liners too.
Gloves inside mitts is an option.

The boots are normally made with removable felt liners.
Sorrel is a classic brand name, but there are a lot of other brands.
http://www.sorel.com/Product.aspx?top=1&cat=110&prod=140

With the removable liner boots it is common to have a spare pair of liners, so that you have a dry set ready to change into, kind of like having extra pair of dry socks with you.
It is hard to get boots to breath and still not get them wet from snow melting on them, so the removable liners are a compromise.

The US Army used to have a boot that was water proof inside and out so your foot didn't get the insulation wet. The boots worked but your feet sweated a lot and were wet all the time.
The Russians used to make boots that were just felt with no waterproof outer layer at all.
They worked to, just so long as it was cold enough to stay dry but they lost effectiveness as soon as it was warm enough for snow to melt on them.