I read plenty of packing lists and sometimes the phrase "spare socks" is used. I assume this means "change of socks," rather than some emergency supply.
I hope to read a little more about this. Please discuss your methods and artifacts as well as environment.
How many socks do you wear and carry? Do your shoes breath? Do you change socks once a day, more than once a day, just leave them on for a week? When, how, and how often do you wash your socks? What about your feet? Do clean socks go on clean feet?

