You'll be amazed at how extremely easy it is for any gent to put together this casually smart ensemble. Just a charcoal blazer and a white and navy vertical striped dress shirt. Avoid looking too casual by finishing with a pair of dark brown suede loafers. When the coldest time of the year leaves you bored in the outfit department, this outfit just might get you jazzed up about winter. As a 30-something guy, you want to start dressing in a classier manner. In this case, ensembles like this prove useful as a source of inspo.