I currently have Sidetrak neoprene shoe covers, and they're not warm enough in sub-freezing temps. Yesterday's commute took place in 25f weather, and my feel actually hurt the last 5-6 miles. I'm looking for something warmer, but they have to fit (Sidi Dominator) MTB shoes (size 44.5).
Suggestions are appreciated.
(Yes, I've considered Shimano MW80 shoes, but can't find my size at a reasonable price.)