These did a great job keeping my feet dry but when your in the temps I was working in (20 degrees or lower all day every day) and you forget to bring your insulated boots, they can only do so much. They gave me about a 10 minute window before I had toesicles working outside. I doubled up on my normal socks and these but it didn't help much. But these are very comfy, didn't make me itch (which wool normally will), and kept me from being even colder by whicking the cold sweat from my feet. Ill be using these till they wear out!