One of the classiest ways to style out such a timeless menswear item as a beige suit is to team it with a dark green horizontal striped polo neck sweater. Finish off this outfit with a pair of white and navy canvas low top sneakers for a truly modern hi-low mix. This ensemble is a pretty good idea, especially for autumn, when the temperatures are dipping. This combo proves that figuring out how to dress stylishly as a 20-something man is quite manageable.