If you don't like getting too predictable with your getups, consider wearing a harrington jacket and black jeans. When it comes to footwear, go for something on the dressier end of the spectrum by finishing off with black suede casual boots. So as you can see, in your thirties you have a wide range of outfit options.
A harrington jacket and black jeans will add serious dapperness to your current casual wardrobe. Kick up your look with black leather derby shoes. And if we're talking casual style for 30-year-old men, this combination is perfect.
When the setting permits an off-duty menswear style, you can easily rely on a harrington jacket and black jeans. A nice pair of black leather casual boots is an easy way to breathe a dash of class into this getup. A fail-safe option pairing appropriate for 30-something gents who like casual clothing.