Davines Styling Products ESSENTIAL HAIRCARE Nounou Mask. A mask designed for dyed or bleached hair. It provides unsurpassed softness and body while protecting and maintaining your coloration for much longer. With a pleasant citrus aroma, it will make your application a delight. To apply it you must distribute it evenly on slightly damp hair with a comb and leave it on for 10 to 15 minutes before rinsing with plenty of water.