As you can see, it doesn't require that much effort for a man to look casually sleek. Just reach for a white and navy check dress shirt and charcoal chinos and be sure you'll look amazing. Get a little creative in the shoe department and smarten up this ensemble by finishing off with brown suede tassel loafers. Seeing as it's hot outside, this getup appears ideal and entirely summer-ready. Now that's how you do semi-casual in your thirties.