Matrix Biolage Smooththerapie Deep Smoothing Serum deeply penetrates unruly hair to smooth and condition. This weightless serum delivers a glossy shine while protecting from heat styling and giving advanced humidity protection. Infused with Camellia, Biolage Smooththerapie Serum leaves hair feeling light and clean yet totally smooth and under control. Get a manageable, glossy finish with Matrix Biolage Smoothing Serum,