For a look that's super straightforward but can be modified in a ton of different ways, go for a tobacco crew-neck t-shirt and black chinos. To introduce some extra depth to this ensemble, complete your getup with a pair of brown leather casual boots. No doubt, it's easier to work through a blazing hot warm weather day in a cool combo such as this one. Perfect if you're looking for some incredibly inspiring relaxed casual style for 30-something gents.