Yes, they are quite durable. They don't like wallets that fold in half very well because it kind of pushes the gold away from the middle and you get like this little line, but they make a specific wallet for goldbacks. But other than that, they are totally durable. I've seen all kinds of damage be done to them and it doesn't really hurt.

I've seen people run them through the wash, ball them up into little paper balls, etc. And they just apply a heat gun to them and they smooth right out, mostly. Still totally usable.