Mask No.3 La Couleur Mask No.3 La Couleur David Mallett's Mask No.3 La Couleuris is the ideal care to prolong hair color and prevent loss of radiance. Made with 90% natural ingredients, it nourishes the hair at a deep molecular level and closes the hair cuticles to restore hair's pH balance.. Ideal for color-treated hair. Light rhubarb scent. Vegan & cruelty-free Free of Parabens and Phthalates. 180 ml. Apply to washed, towel-dry hair, distributing evenly from roots to the ends. Leave in for 5 to 10 minutes, then rinse thoroughly. DAMR-WU20. MAS-03. David Mallett Haircare range stands out for its highest quality, its technical innovation and its excellence. They offer a luxurious assortment of products that are easy to understand and use, with performant formulas that have been extensively tested, debated and improved by experts. Made entirely in France, each formula contains highly-concentrated key ingredients, free of parabens, phthalates, harmful substances and other unnecessary chemicals.