Professional haircare. Humidity control & anti-frizz polisher. Silk Smoothing Serum: Revolutionary silk protein solution nourishes and restores all hair types. Humidity control polisher battles frizz leaving hair soft and silky without feeling greasy. Perfect for curly and straight hair as well as moisturizing skin. Enriched with vitamins A, B5 & E. Enriched with hydrolyzed silk. No animal testing.