So I need to upgrade my worn out hi rubber boots with thinsulate insulation. Kamik has some nice boots but they use 5, 7 or 9mm neoprene insulation. I can't find any comparison values on line. Can anyone give me an idea what thinsulate weight equals a neoprene thickness? Since 9mm is the thickest I can find I assume it may be like a 1200-2000 thinsulate? Would hate to be my own Guinea pig in zero degree weather.