The variegated shape of this succulent presents the typical yellow zones in the exact points where the chlorophyll is absent. These striations will never be the same from one plant to another, therefore each plant will be absolutely unique and, for this reason, strongly sought after by fans of succulents. The name of the species comes from the unusual use of its sap, which since ancient times was exploited as soap. Its stem, of dark green colour with oval white spots, has long fleshy leaves with red indentations at the margins, with an initially erect posture tending to flatten in the more mature plants. Its inflorescences take place mainly from spring to summer, generating, at the apex of long stems, numerous and showy hanging flowers with a salmon pink colour.