This pairing of a long sleeve shirt and olive chinos is the perfect base for a casually stylish look. Complete this outfit with black desert boots and you're all done and looking dashing. During winter, when functionality is above all, it can be easy to settle for a less-than-stylish look in the name of convenience. This look, however, is hard proof that you totally can stay cozy and remain equally stylish during winter. And if we're talking casual dressing ideas for gents in their thirties, this combo looks good on most gents.