I purchased this boot just in time for the snowmageddon that the Northeast faced last winter.  I found that the sizing was on target and actually slightly roomy- I usually wear a size 8M and could have worn them with thick socks wihout any problem. I wore them with regular sport socks and had no problem with cold feet.  I used them to stand out in snow for an hour shoveling knee deep snow in 20 degree weather- had no problem. Good traction on the sole too. Definitely recommend this boot and plan to buy a pair for my mother.