While I hesitate to post a website called "justsocks.com" I would like to share info about "INGenius" socks. These socks have built in liners and are the most comfortable I've ever worn hiking. Highly recommended!

http://www.justsocks.com/catalog/ingenius.cfm


(No offense to justsocks.com, but it just rings too much of 1999 - I am sure you are making money now, though!)