Effortlessly blurring the line between cool and casual, this combo of a long sleeve shirt and charcoal jeans will likely become your favorite. Tap into some David Gandy stylishness and go for a pair of chelsea boots. So if you're looking for a look that's sharp but also entirely season-appropriate, this one fits the task well. Wondering how to perfect smart casual style in your mid-20s? This combination is the perfect answer.