If you're looking for a casual but also seriously stylish getup, consider teaming a navy blazer with olive cargo pants. Introduce a pair of loafers to the mix for a major style boost. This combo isn't a hard one to nail and it's season-appropriate, which is important when it's super hot outside. This one is a modern yet mature ensemble for a gent in his thirties.
If the situation calls for an effortlessly polished menswear style, you can easily rock a black double breasted blazer and olive cargo pants. Complete this getup with loafers to avoid looking too casual. Naturally, it's easier to work through a baking hot hot weather day in a fresh combo like this one. A good pairing as you step into the next stage of your life.