No argument whatsoever with the opinions expressed above. I'll play the contrarian role here...
My feet would probably die in uninsulated boots on a September moose hunt. I routinely hunt valleys with lots of cold frosty mornings (heavy frost the majority) and have seen a solid week of accumulating snow with temps to single digits by the 20th. I used to wear Schnee's pacs and they didn't cut it...partly because of water absorption (leather) over a 10 day hunt. I made the switch to 1000gm rubber Lacrosse boots a few years ago and that solved things. No wet boots. Change outer socks once a day at lunch and interior of boot never gets damp.