I use good large size wool socks and mil spec Mickey Mouse (or bunny) boots.
they have insulation sandwiched between a inner rubber lining and the outer skin of the boot. No matter how wet your feet get they will be warm again in minutes. Your body heat will warm the water or moisture
Insulation won’t work if it’s damp or wet and because with these type boots the insulation can’t get wet it always insulates and you always stay warm
Been using the same pair for years and still work as good as day 1
They are a little tricky to drive in tho. But with a little practice it’s no trouble