For a casually smart ensemble, choose a grey herringbone overcoat and navy jeans — these two items play nicely together. When this ensemble looks too perfect, dial it down by rocking a pair of black athletic shoes. Keep this getup in mind when warmer days are here, and we guarantee you'll save a lot of time crafting what to wear on more than one occasion. Casual combinations for men in their 30s aren't actually that hard, as you see here.