Demonstrate that you do semi-casual menswear like a true expert in modern men's fashion by opting for a brown sweater vest and beige chinos. Complement this getup with white leather low top sneakers to give a sense of stylish nonchalance to this ensemble. As a gent in his 30s, you want to start dressing more like a mature gentleman. If that's the case, looks like this are a never-failing option.
As you can see here, looking casually smart doesn't take that much time. Consider pairing a brown sweater vest with navy jeans and you'll look incredibly stylish. Finishing off with a pair of white leather low top sneakers is the most effective way to introduce an element of stylish casualness to this outfit. A perfect example for any gent who's still working out how to dress maturely as a young man.