I had a saleswoman tell me that rating tells you how cold they were rated for (while actively moving):
Thinsulate 400 = -40 degrees F
Thinsulate 600 = -60 degrees F
Thinsulate 800 = -80 degrees F
etc.
LMAO I guess I won' be going to Lane Bryant to buy my next pair.
Ha ha. No, actually it was the local Sportsmans Warehouse. Figured it was just salesperson B.S. so I bought the pair that fit me best. Ended up being a Thinsulate 800 boot (I wanted a 400 or 600 but didn't care for the boots they came in).
As I said before, with a good pair of wool socks they've been great in every hunting condition I've used them in.
