When the situation calls for a sophisticated yet killer ensemble, make a tan shirt jacket and dark green corduroy chinos your outfit choice. White canvas low top sneakers are an easy way to inject a touch of stylish effortlessness into this outfit. You're guaranteed to always look cool even despite the crazy heat if you have this outfit as your go-to formula. Gents who wonder how to rock modern casual outfits as you work your way through your 20s, this combination should answer your question.