Explanation:

Kayotsarga is a yogic posture which is an important part of the Jain meditation. It literally means "dismissing the body". A Tirthankara is represented either seated in yoga posture or standing in the kayotsarga posture.
Kayotsarga means "to give up one's physical comfort and body movements", thus staying steady, either in a standing or other posture, and concentrating upon the true nature of the soul. It is one of the six essentials (avasyaka) of a Jain ascetic and one of the 28 primary attributes of a Digambar monk.