I don't know why it has taken me so long to discover Smartwool...maybe because I've mostly lived in warmer climates like the south and southwest of the U. S., but I just love these socks. I have found that once my feet get cold, I stay cold, and this has become a problem for me while traveling. But these wonderful Smartwool socks keep my feet and legs warm and dry. Also, these long socks fit well enough to not only stay up, but act kind of like compression socks for long trips. I just love these and now have several pairs.