This combo of a yellow crew-neck t-shirt and light blue jeans delivers comfort and style. Finish off with a pair of oxford shoes to transform your ensemble. So if it's a baking hot warm weather day and you want to look dapper without exerting much effort, this ensemble will do the job in seconds time. As a 30-year-old guy, you probably want to start dressing maturely. In this case, inspiration like this comes in very handy.