I put a carheart sock, cem heat pad and this sock over the whole lot. Shoes and show covers and I'm good for down to 20 degrees. And on a recumbent , your feet get all the wind. Great waterproof winter sock.
The Universal Gore-Tex Sock is a must have for the year-round rider. I ride in all weather conditions for transportation and recreation. Waterproof socks are the only totally reliable solution I have found to keep my dry through the rainy winters. They are also surprisingly breathable.