coat animation. Text: Fashion School - Duster Coat - A full length, loose fitting coat with wide sleeves and often no buttons or adornments. Originally worn by horsemen, the jacket later became popular for both men and women to protect clothing from dirt when riding on horses or motorcars. While it's similar to a trench coat, dusters were more about keeping clothes clean than warmth. Today, the style is often found in simple, snuggly fabrics to wrap up in during cooler weather.