As I get older and have less hair, and as the weather gets colder, I need something on my head.  I'm really sick of trying to find a cap that doesn't have that one size fits all hole in the back, so I decided to try a hat.  The measurement is exact, the felt is flawless, the construction is impeccable.  And, it really is crushable.  I have rolled mine up and folded it and stuffed it into my pocket for hours, and then it opens up and with only a few shakes is ready to go.  I walked in the rain one day hoping it wouldn't be a mess afterward.  It didn't even get very wet and it looks the same now as when I bought it.  I have since bought three more, and I wear them regularly.