Inner cassock: The inner cassock (more commonly, simply cassock) is a floor length garment, usually black, worn by all clergy members, monastics, and seminarians. Outer cassock: Called a ryasa (Russian: ряса) or exorason, the outer cassock is a large flowing garment worn over the inner cassock by bishops, priests, deacons, and monastics. Skufia: A soft-sided cap worn by monastics or awarded to clergy as a mark of honor.