This combination of a white long sleeve t-shirt and navy chinos is seriously stylish and yet it's laid-back enough and apt for anything. Why not add beige athletic shoes to the equation for a more relaxed feel? Stick with this one if you're on the lookout for a solid summer look. Overall, a good example of casual fashion for 30-something gentlemen.
For something on the cool and casual side, you can wear a white long sleeve t-shirt and navy chinos. Finishing with a pair of beige suede sandals is a fail-safe way to infuse a more relaxed vibe into your look. Seeing as it's blazing hot outside, this combination appears ideal and entirely season-appropriate. Overall, an ideal demonstration of off-duty fashion for 30-something guys.