Biolage Smooththerapie smoothes unruly, frizzy, medium to coarse hair with silky serum of Camellia. Serum-infused technology deeply moisturizes and helps control frizz through all seasons-even in 97% humidity. Deep Smoothing Conditioner softens and detangles instantly as it deeply conditions hair for polished shine, smoothness, lasting control and manageability. Cares for Color-Treated Hair.