When conducting the ceremony, the emperor wore a gown embroidered with five-clawed dragon, the sun, the moon, stars, clouds, mountains, pheasant, water waves, algae, etc. In many types of royal costumes, only this gown is decorated with images bearing so much symbolic meanings. Thus, the gown worn by the Nguyen emperor in the Giao sacrificial ceremony was not only a costume but also a symbol of the emperor's role in relation to heaven and earth. Among royal costumes in the monarchical time of Vietnam, this was the only gown for the Giao sacrificial ceremony left to this day. The gown of the Nguyen emperor in the Giao sacrificial ceremony was recognized as the Vietnam National Treasure in 2015.

Emperor Khai Dinh in the gown of the Giao sacrificial ceremony (1924)