Tame frizz and boost shine with the Biolage Smoothproof 6-in-1 Professional Hair Serum, expertly formulated for frizzy, unmanageable hair. Enriched with Avocado and Grape Seed Oil, this lightweight, non-greasy serum provides six benefits in one: frizz control, smoothness, shine, nourishment, detangling, and humidity resistance. Made with natural, vegan ingredients, it's perfect for daily use and salon-like results at home.