The spring nuptials circuit is a marathon, not a sprint. Here's all the menswear you need to crush RSVP season, no matter how nebulous the dress code or far-flung the locale. Not sure where to start?

Every retro grail on our wish list right now, as surfaced by eBay, the official preloved partner of GQ—and menswear nerds worldwide. The hybrid sneaker/slip-on is nothing new but still remains a fresh ...