Marry a red plaid short sleeve shirt with navy jeans for a stylish and easy-going outfit. If you want to easily step up this getup with shoes, why not add black suede derby shoes to the equation? So if it's a summer day and you want to look dapper without putting too much effort, this ensemble will do the job in next to no time. If you're not sure how to dress maturely but also look fashionable, this combo is a goofproof option.