This smart pairing of a navy shirt jacket and chinos is super easy to put together without a second thought, helping you look stylish and ready for anything without spending too much time rummaging through your wardrobe. To give your overall ensemble a more relaxed twist, complement your look with a pair of black leather sandals. A killer ensemble like this one is just what you need on a super hot hot weather afternoon. Those wondering how to rock cool casual outfits as you work your way through your 20s, you have your answer.