To master smart casual, focus on a balanced combination of classic and contemporary pieces. A navy blazer paired with a crisp, high-quality shirt—such as the Dress Collar Polo™—is a timeless choice.

Spearheading a gutsy corporate takeover? Suiting up for gam-gam's 90th bash? Don't overthink it: the shirt you're looking for is right here.

Too-casual jeans There’s nothing wrong with wearing jeans to a casual office, but be cautious when choosing the style, says ...