The layer you didn't know you were missing. A gilet adds warmth through the core without the bulk of a full jacket, which means your arms remain unencumbered and your silhouette stays clean. Wear it under a coat on genuinely cold days, or over a shirt in the shoulder seasons when a jacket feels like too much and nothing feels like too little. Sixty-one styles here, in down, wool, knit, and technical fabrics, from the casual to the considered.