If you love relaxed casual combinations, then you'll like this combination of a charcoal wool harrington jacket and black cargo pants. Black leather chelsea boots will breathe a sense of refinement into an otherwise mostly dressed-down look. It's a great option if you're crafting a standout ensemble for in-between weather. As a 30-year-old gentleman, you probably want to start dressing like an adult man. If that's the case, combinations like this are a foolproof option.