duster

A long, loose, lightweight and button-less coat worn especially when riding in an open car to protect underclothing from dust and often considered a woman’s garment.

//Oh, there were plenty of them to abet him, assist him, make a race of it; ten oclock on Sunday morning, the carriage racing on two wheels up to the very door to the church with that wild negro in his Christian clothes looking exactly like a performing tiger in a linen **duster** and a top hat, and Ellen with no drop of blood in her face, holding those two children who were not crying and who did not need to be held, who sat on either side of her perfectly still too, with in their faces that infantile enormity which we did not then quite comprehend.//

--AA (16)