As someone who doesn't really have any idea about smart casual/casual/formal events. Iconic should have a section of their website/app where you can come and select what type of event it is and then you can build your outfit. The pairings are okay, however I have found that sometimes the outfit doesn't really mesh well.

i.e you come to the app you select the event being a smart-casual and the season of the event you can then go through and pick everything from Shirt, pants, shoes, belt and even accessories.