For a casually classic menswear style, pair a harrington jacket with a zip neck sweater — these items play perfectly well together. If you wish to effortlessly play down this look with one single item, why not introduce a pair of tan suede low top sneakers to your outfit? So as you can see, it's a sharp, not to mention season-appropriate, ensemble to have in your transeasonal rotation. So if you're in search of style ideas on how to dress as you pass the big 3-0, this outfit is definitely worth saving for later.