I have always had cold feet in eg, rubber boots. Then I remembered my day, because I had red-blue checkered boots socks and who kept my little feet wonderfully warm and cozy. That's why I ordered this and indeed the same as a double because I have that, either to change or to make them even to wear in different shoes. They are very comfortable to wear and I do not notice the center seam, which I had read in another review that is. I can recommend the Boot Socks anyone who is prone to cold feet.