Clrnc I was wondering, as usual, what you were going on about. But in fairness, I'd been in the Twelve Pins about five minutes today and it was clear you're right. I think the home shirt (yes, I'm still clinging to it) is okay, but the difference in material between the the authentic and replica versions of the third shirt is quite stark.
There again, it's not like you're avoiding a sweaty experience either way, so maybe it doesn't matter that much.