Frizzy hair needs special treatment to control flyaways. Cue this salon product serum, designed to hydrate and heal even the most brittle and frizzy strands to create a sleek, shiny, healthy hair look. Inspired by nature's water-resistant camellia, Biolage Smoothproof Serum is an advanced hair oil for frizzy hair that provides humidity control and anti-frizz smoothness even in 97% humidity.*Creates perfectly smooth hair for up to 72 hours.*Tames frizzy hair and flyawaysEnhances hair shineKeeps hair smooth and protects against heat styling tools and humidityParaben-free formula is color safe and suitable for color-treated hairLet go of frizz and unwanted volume with state-of-the-art formulas inspired by nature that mimic the water-resistant properties of the camellia flower. Formulas work to encapsulate hair and align the cuticle to help lock out moisture for control and smoothness even in 97% humidity.**When using the professional products system of Smoothproof shampoo, conditioner and serum vs. a non-conditioning shampoo.