I know what you mean about the Mickey Mouse boots. My feet also sweated like pigs, but the duckcloth Arctic boots (military issue) have proven to be warm, breathable, & the most comfortable footwear I have ever worn. Of course, I was also wearing the wool booties and wool socks with them.
I also liked the Arctic duck cloth trousers (along with suspenders).
It's the jacket and arctic liner that seems to bulk everything up like Ralphie's little brother, to me anyway. Right now, I am using a Swedish Army field jacket which is good although the Arctic liner in it, is bulkier than the US Army M-5 liner. Still it blocks the wind and I don't have to use the liner very often in South Louisiana & SE Texas.