Have the mentioned what that is a waveform for? I bet it is for Blue Moon... If not... what could it be? And more importantly, what is the point?
Kit manufacturers are always trying to do some dumb motto or stitching to make the jersey sell. I have no problem with the motto being there, just trying to use that as a selling point is ridiculous. If the kit is shit, people won't buy it and if it looks good, people will buy it. But people need to feel like they can wear it casually. On an aside, I hope Barca doesn't sell any of their kits this season. They are absolutely appalling, even a line from the club anthem embroidered into the jersey couldn't save that train wreck. Nike turned that kit into a case study on how to not do stripes. City is very very lucky we have Umbro.