I bought a few pair of these in different colors - some for me, and some as a Christmas present for my brother.
I arrived at the merchant's website thanks to a link from wherever (possibly/probably here?) for a festive little golden tin ornament of a nutsack - also purchased one each for my brother and I.
The geniuses behind these sophomoric products was a mail order place in Spain. And they weren't cheap. I paid a not inconsiderate amount for all of it, (couldn't find an equivalent product cheaper or closer elsewhere) but ultimately thought the potential for mischief worth it.
And it took fucking forever to arrive.
And when they did, the socks are the biggest piece of crap garbage you can imagine. It's just a loosely stuck-on, flimsy, cheap, rubbery sticker that wouldn't survive even five minutes of actual wear.
Completely disappointing.
But the golden nutsack ornaments didn't disappoint.
I can't easily find either product right now, though if I do later, I'll edit my post with a picture.