When the situation permits casual street styling, pair a white and blue long sleeve shirt with shorts. When not sure about what to wear on the footwear front, complete your outfit with brown suede espadrilles. Ideal if you're looking for some incredibly inspiring style for over-30 guys.
For an off-duty look with a modernized spin, you can dress in a white and blue long sleeve shirt and shorts. A pair of navy canvas espadrilles can integrate effortlessly within a variety of combinations. This combo should clear any doubts you had about dressing casually as a young gent.
For a look that delivers comfort and dapperness, pair a white and blue long sleeve shirt with shorts. Overall, a great example of casual style for 30-year-olds.