Those would be expensive to 'test wash' if they shrunk. I don't know.

I've washed some dry clean only stuff before, and it's been okay, but I honestly forget the fabric type. I've also tumble dried some clothes that were supposedly 'line dry only' and they came out fine too. But I buy cheap clothing, so I'm a bit of a maverick.

Seinfield, incidentally, has a funny bit about dry clean only tags. He talks about how people will break all sorts of traffic laws, and do all sorts of foolishly dangerous things, but they go nuts over 'dry clean only'. How if you try to put one in the washer people are like: "Oh my god, that says dry clean only, are you mad?!" Heh.