Ok, so that in and of itself will not keep your feet warm, but when coupled with the gear that normally accompanies ice fishing enthusiasts it is a great way to keep your puppies happy.  The problem with most socks that people wear is that they are made of cotton.  Cotton is a very comfortable, but is terrible for staying warm.  The moment it gets wet it holds the moisture directly against the skin and that will make you cold every time. 

Smart wool socks are great in that they are made to be comfortable and not scratchy like wool is always considered to be.  On top of that, it carries the key aspect of all wool: it keeps you warm even when wet. 

Try a pair today and notice how much better it keeps your feet comfortable and warm.