Kept my feet warm but the bottom of it had too much room for my feet socks were not snug or comfortable and the crew top kept slipping . My feet slipped in the socks a lot which can cause blisters plus with the sweat  that was left not good  not going to buy these again .I'm gonna stick with Nike branded socks (which are dry-fit) , and get a warmer lined /gore-tex boot to wear while I'm at work.