A waistcoat looks especially refined when combined with olive jeans in a modern man's look. So if you're looking for a nice and age-appropriate outfit, look no further.
Olive Jeans with Waistcoat Smart Casual Outfits In Their 30s
To look like a British gentleman, choose a waistcoat and olive jeans. And if you wish to immediately up the style ante of this getup with a pair of shoes, why not complement this look with a pair of black leather loafers? Wondering what clothing is appropriate as you slip into your 30s? This ensemble is an amazing example.