I'm a very poor blogger these days, but I don't want you to go away empty handed.
Check out Hema's product page. Be sure to leave it open a few seconds, then see what happens.
Hema is a department store in The Netherlands where I once bought some socks. My socks never acted like this, though.
(I found this at Andrew Tobias's blog-like website. I always learn something from him, so check it out.)