For seriously stylish menswear style without the need to sacrifice on practicality, we like this combo of a navy harrington jacket and black jeans. If you wish to easily lift up your ensemble with one piece, why not complement this ensemble with a pair of brown leather brogue boots? This combination is an excellent option when it comes to a neat getup that will take you from summer to fall. Casual outfits for 20-something gents aren't actually that hard, as you can see here.