A grey short sleeve shirt and cargo pants are a combination that every modern gent should have in his casual repertoire. Go ahead and complete your outfit with a pair of white and black athletic shoes for a dose of stylish casualness. Keep this ensemble ready to go come spring, and rest assured, you'll save time racking your brain for an ensemble on more than one morning. Casual combos for stylish middle-aged men aren't actually that hard, as you see here.