Summer weddings tend to be less formal than their cold-season counterparts, so instead of a two-piece suit, why not lean towards mix-and-match separates? Try slipping a cool, short-sleeved cotton T-shirt under your blazer, for example, or a collarless shirt with tailored trousers sans jacket. Polo shirts may not traditionally be something you reach for when it comes to wedding attire, but a less formal dress code leaves room for experimenting with those, too. Think of tucking the boxy silhouette of a Fear of God velour polo into tailored trousers. Likewise, Giorgio Armani has a whole host of expertly tailored trousers that effortlessly smarten a more relaxed top.