Cool and Christmas aren't used in the same sentence in Oz. We tend to dispense with sweaters and go bareback with shorts. That's for formal dining, of course. If we're informal we stick with swimwear and thongs. (Don't get excited. It hasn't quite come to that yet. Australian thongs are called flip flops in the US,)
LOL!!! Don't think I've ever seen a cool Christmas sweater, I've seen a lot of tacky ones but never a cool one.
Gotta love this one!