A smock-frock or smock is an outer garment traditionally worn by rural workers, especially shepherds and waggoners. Today, the word smock refers to a loose overgarment worn to protect one's clothing, for instance by a painter.
The traditional smock-frock is made of heavy linen or wool and varies from thigh-length to mid-calf length. Characteristic features of the smock-frock are fullness across the back, breast, and sleeves folded into "tubes" (narrow unpressed pleats) held in place and decorated by smocking, a type of surface embroidery in a honeycomb pattern across the pleats that controls the fullness while allowing a degree of stretch.