A grey crew-neck sweater and khaki jeans? It's easily a wearable look that anyone could wear a variation of on a day-to-day basis. Give an elegant twist to your ensemble with a pair of brown leather double monks. Definitely a never-failing choice if we're talking style tips for 30-something gentlemen.
If it's comfort and practicality that you're seeking in an ensemble, go for a grey crew-neck sweater and khaki jeans. On the fence about how to finish your ensemble? Wear a pair of black suede loafers to amp it up a notch. A reliable option for gents in their 30s looking for a more mature image.