A long, lightweight coat, often unlined and made of breathable materials, extending to or past the knees is known as a duster. Historically, these garments protected riders and their clothing from dust and dirt while traveling. A typical example is a lightweight canvas coat worn by ranchers in arid regions.
The significance of this type of outerwear lies in its protective qualities and its association with historical figures and settings. It offers a practical solution for shielding clothing from environmental elements. Its historical context evokes images of the American West and a sense of rugged practicality.