A navy denim jacket and a multi colored plaid long sleeve shirt are among the key pieces in any modern man's great off-duty wardrobe. And if you need to immediately smarten up this ensemble with a pair of shoes, why not complement this ensemble with a pair of black leather tassel loafers? This look is also ideal if you're on the hunt for hot weather wear to get through a boring day. As you step into your 30s, you probably want to start dressing like a grown-up. That's when inspiration like this is very useful.