Reach for a navy wool blazer and brown chinos for a sleek classy menswear style. Go off the beaten path and jazz up your getup by sporting a pair of black suede chelsea boots. So as you can see, it's extremely easy to look amazing and stay snug come colder weather, thanks to this look. Guys who are curious how to pull off smart casual outfits as you go through your 20s, this pairing should answer your question.