Great hair starts here. This traceless serum—the first step post-shower—replenishes the all-important F-layer: the protective lipid layer that locks in moisture and gives hair its natural smoothness, gloss, and ability to reflect light. Weightlessly hydrates, repairs, and preps hair for styling thanks to vitamin- and mineral-rich Fruit Water Extracts and the nourishing Oil Botanical Blend.Use:Apply light serum to towel-dried hair and comb through to detangle. Style as usual.124 ml R+Co Bleu Bleu F-LAYER deep conditioning serum 124 ml