Kiehl's Iris Extract Activating Treatment Essence gently hydrates skin while helping to smooth fine lines and improve skin texture. At the same time, it has anti-aging effects and thus helps to activate the exfoliation process of the skin for a smoother and more radiant appearance. Essence is the very first step after cleansing in skin care. In addition, it multiplies the effects of subsequently used products. The skin looks healthier and without fine lines.