A brown houndstooth blazer and navy jeans are essential in any modern gent's great casual closet. You could perhaps get a bit experimental when it comes to shoes and introduce dark brown leather loafers to the equation. Style like this is what will gain you respect from your peers over time.
Why not team a brown houndstooth blazer with navy jeans? Both items are very comfortable and look awesome when teamed together. A pair of black suede tassel loafers easily kicks up the wow factor of any ensemble. Classic ensembles like this are worth having in your wardrobe at any age.
Why not try teaming a brown houndstooth blazer with navy jeans? Both pieces are totally practical and look cool married together. For something more on the smart side to round off your look, add black leather chelsea boots. This look is probably exactly what you've been looking for as a man in his 30s.