A o-rag, also spelled doo-rag, du-rag, durag is a piece of cloth used to cover the head. The term do-rag is itself an acronym derived from Drive-On rag, a term that first came into usage among U.S. soldiers during the Vietnam War. The original Drive On Rag or DO Rag was the compressed muslin bandage that comes in most military First-Aid Kits.