L oral professionnel liss unlimited smoothing double serum is a dual action serum designed to give you up to four days anti frizz smoothing protection enriched with pro keratin and kukui and evening primrose oils the l oral professionel liss unlimited sos smoothing serum provides an anti frizz effect whilst leaving the hair feeling super soft and manageable directions on finer rebellious hair types use 1 2 pumps on towel dried hair and comb through on thicker rebellious use 3 4 pumps on d