A long sleeve t-shirt and navy jeans? It's an easy-to-wear ensemble that any guy can wear a variation of on a day-to-day basis. Let your sartorial savvy truly shine by finishing off your outfit with tan athletic shoes. Keep this combo ready to go when spring comes, and we promise you'll save a ton of time planning an ensemble on more than one occasion. This ensemble should clear any doubts you had about wearing casual clothes as a 30-something man.