The mule shoe for men has had a more interesting trajectory than you might expect given that it started as something associated almost exclusively with very specific style tribes and has ended up being a genuinely useful casual option that a much wider range of men can work into their rotation. The backless slip on silhouette creates a relaxed ease that works particularly well in warmer months. Over a pair of straight cropped pants or shorts with minimal socks or no socks it looks deliberately casual in a way that feels current rather than sloppy. The leather mule in a neutral colour is the most versatile version because it has enough quality and finish to look considered rather than thrown together. Keep everything else in the outfit clean and fairly minimal and the mule does a good job of adding something quietly interesting to a look that might otherwise be fairly unremarkable.