With an excellent reputation for smartly-dressed businessmen, this Zegna show was definitely a little "out there"--but that's OK. The most interesting quirk were the collars on the dress shirts. As you can see below, the collars are rounded, with a tab button. In fact, the tabs were often presented unbuttoned, either in the spirit of sartorial nonchalance or maybe to simply be more obvious to the viewer as to what they were.
Another odd accessory, worn at the waist, was a cross between a Batman-like utility belt and a money belt.