I love the warmth of the TAIGA booties
https://www.taigaworks.ca/Booties-and-Gaiters-c9
The only thing I would do to improve them is add a light grippy waterproof sole to them.
That said, on cold winter expeditions, I bring a pair of overboots to wear over them outdoors and once the overboots are off, I can wear them even in my sleeping bag if I need to.