For a foolproof laid-back option, you can't go wrong with this combo of a long sleeve shirt and navy chinos. Make this ensemble a bit more refined by finishing with navy leather tassel loafers. Combos like this have a sophisticated air that befit gents in their thirties very well.
This relaxed casual combination of a long sleeve shirt and navy chinos is a real life saver when you need to look stylish in a flash. To bring a bit of depth to this look, introduce violet canvas loafers to the mix. After thirty, you want to start dressing maturely. In this case, looks like this are perfect as inspiration.
Show that no-one does off-duty like you by opting for a long sleeve shirt and navy chinos. Brown suede desert boots integrate perfectly within many combinations. This combo is probably exactly what you're looking for as a 30-something gent.
For an outfit that's super straightforward but can be worn in a variety of different ways, dress in a long sleeve shirt and navy chinos. For something more on the classy side to finish this outfit, complete your outfit with a pair of dark brown leather derby shoes. All in all, a great insight into fashion for 30-something men.
For a laid-back and cool getup, wear a long sleeve shirt with navy chinos — these items play nicely together. Balance out your getup with a classier kind of footwear, such as these navy suede loafers. This combination illustrates that after 30 your styling options are far from limited.