This combination of an orange puffer jacket and a beige crew-neck sweater is a safe option when you need to look effortlessly sleek in a flash. Does this outfit feel too perfect? Let a pair of brown snow boots jazz things up. When it's one of those gloomy autumn days, what better to cheer it up than a sharp look like this one? When it comes to casual style tips for 20-something guys, this outfit looks great on most gentlemen.