Technically, yes, but it's not recommended for everyday use. Without a cover, your doona is exposed directly to body oils, sweat, and dust mites, requiring much more frequent washing. Repeated washing accelerates wear on the outer shell and can degrade the fill over time. A quilt cover acts as a protective barrier, keeping your doona cleaner for longer and dramatically reducing how often it needs a full wash - typically down to two or three times per year with regular cover changes.