Go for a pared down but laid-back and cool choice combining a white and navy horizontal striped long sleeve t-shirt and olive chinos. Let your sartorial credentials really shine by complementing this outfit with a pair of white low top sneakers. So when spring is in full effect, this ensemble is likely to become your go-to. And if we're talking casual dressing ideas for over-30 gents, this getup looks great on almost any gentleman.