I have a pair of Danners lace to toe with 400g Thinsulate and I wear a ultralight liner sock. I have had these boots for 7 years, are the most comfortable footwear I own except for my fuzzy slippers and my feet only got chilled once(last fall when I was driving home after packing out an elk in 1 foot of snow, but I think that was just due to sweating too much). The biggest downside to them is that they are big heavy SOBs, which is why I stick to my hiking boots when silence is a necessity and I won't be packing out over 80 lbs of meat. I have had them re-soled once and will wear them until they fall off my feet.