A blazer and an olive waistcoat are a sophisticated getup that every modern gent should have in his sartorial arsenal. Brown woven leather loafers will add a fun feel to an otherwise traditional ensemble. So if you're looking for an ensemble that's dapper but also feels entirely spring-appropriate, this one fits the bill. As a 30-something man, you probably want to start dressing more elegantly. In this case, inspiration like this comes in very handy.