When my feet get cold they cramp and this has put a stop to that. Also, there is no wool in these thermal socks. Most other brands are made at least in part with wool. So whether your allergic to wool or just don't want to contribute to the inhumane treatment of animals, these socks fit the bill. They are warm and thick and fluffy. Yes, they start looking a bit tattered pretty quickly. They snag easy and they ball a bit but I don't care. I put them on as soon as I get home and don't take them off until I have to put shoes and sock on. Speaking of shoes, I wouldn't suggest trying to wear these with shoes. They are too big and thick for that. But they are perfect around the house. You can even sleep in them.