This combo of a blue polo neck sweater and beige dress pants is a fail-safe option when you need to look classy and incredibly stylish. You can get a bit experimental when it comes to footwear and add navy leather derby shoes to this ensemble. We're loving that this combo is great come cooler weather. As a 30-something gent, you want to start dressing maturely. That's when getups like this are a fail-safe option.