In 1963, I watched native Canadians in a roadless village up near Hudson's Bay make mucklucs from caribou skins... only single skins for uppers, made them so comfortable yet very insulated. 2 skins for souls kept both cold and wet out, but they would leak around the stitches for the first year or so. After that, bear fat grease would eventually make them completely watertight. I gave up on my US army boots with thick wool socks for barefoot in a muckluc and I survived a wonderful week in seasonal high of 10 degrees. Would like to know any other history of this footwear from any source.