Liner socks certainly make a difference to me. And the liner socks at WalMart currently under the Realtree label are the ones I've been using. I stocked up on a bunch of them. They are as good--or better--tha any other (expensive) liner I've used.
Over the liners I wear Smartwool hiking socks. I run uninsulated hiking boots for hunting Sept-Nov, and my feet don't get cold.
Caes
