Marrying a brown trenchcoat and a crew-neck t-shirt is a fail-safe way to infuse polish into your wardrobe. To bring a dressed-down feel to your ensemble, introduce a pair of white leather low top sneakers to this outfit. So if you're searching for a look that's on-trend but also feels entirely spring-friendly, this one fits the bill. No doubt, a fail-safe choice if we're talking dressing ideas for 40-something men.