Matrix Biolage SmoothProof Conditioner is inspired by nature s water-resistant camellia. It is formulated to eliminate tangles and frizz while controlling static. It also protects against humidity to keep hair smooth. Frizzy hair is often difficult to manage in humid weather. Matrix Biolage conditioner provides humidity control and anti-frizz smoothness even in 97 percent humidity (when used with shampoo and serum). This paraben-free formula can also be used on color-treated hair.