>> Ok, guys. This is SUL...
Brasher Boots: 32 oz
Overboots: 16 oz
RBH Socks: 5 oz
Wool sock liners: 1 oz
Total footwear: 54 oz (3 lb 6 oz)
Which is about the weight of the summer classic backpacking boot: La Sportiva Makalu.
Only this equivalent weight system is being taken to subzero temperatures.
This is a skills exercise, for sure, but it's also extremely useful to highlight what you can do successfully for so little weight.
And, I'm not really sure what skill there is in using winter footwear. Put it on in the morning and take it off at night.
The only way I could see to go lighter, and I'm game with that, which would require more attention, is to replace the brashers with some 1.5 lb trail runners...this option would require a little more attention paid to where you walk (inability to traverse sidehills as well, and mixed snow/rock would be tough without also carrying a full gaiter and using waterproof shoes.