Socks are mentioned an awful lot in Harry Potter.
For an interesting argument, check out
http://www.hp-lexicon.org/essays/socks.html

The part I like is:
"Dobby knows things they [Ron & Harry] have yet to learn.
What's the betting these socks will reappear, and turn out
to have some powerful magic knitted into them?
Were these the ones Dumbledore saw in the Mirror?"

After reading this little essay, I believe it.