 Here's a smart casual outfit for spring. So here I am in a very basic, but unfinished look. I've got a micro-stripe button-down shirt, stone-colored cotton trousers, brown belt, brown shoes. Now to finish it off, there are a couple different ways I could go with this. But the obvious choice being to throw in a navy sport coat. Looks good, it's classic. But what if I want this to be more casual? That is when we bring in the full zip cardigan. You still get that sport coat look, but a much more casual feel. Also, because you've got more coverage, it can pull double duty as a transitional outerwear piece. Two final details, first, the watch. On my wrist, I've got the Vacheron Constantin Traditionale and for fragrance, Au Sauvage by Christian Dior.