These are great socks and now I understand Smartwool's premium price. They have thick underfoot padding and hold feet well. I wear them on cold and warm days and the socks keep my feet warm and dry too. I've also worn them hiking dusty, muddy trails and sand, and the socks are woven so well that the dirt and sand don't reach my feet. If they weren't $20 a pair I would buy a few more.