The Intensive Moisturizer Rich Mask from the Curl Expression line by L'Oréal Professionnel Serie Expert is a particularly intensive hair mask for curly to frizzy hair. It gently envelops dry hair and provides the curls with intense moisture, thanks to its extremely rich, buttery formula. Achieve instant shine and frizz control for the luxurious feel of tamed hair. Application: Squeeze excess water from wet hair. Apply the mask generously. Massage in. Rinse out with water.