Professional care is required for sparse, thin and shedding hair to reach a thicker, fuller and healthier structure. Biolage Fulldensity series is a special system designed to reduce hair loss. Formulas containing biotin-zinc PCA and glucose-omega mixture provide dense hair that feels thicker and grows healthily. Fulldensity Densifying Leave-In Spray Serum - penetrates each hair strand and with its concentrated content, helps to increase the diameter of the hair strands - making them feel more dense and voluminous. Ideal for thin hair that has thinned out due to shedding. It strengthens thin hair lengths - helps to increase the diameter of hair strands. Hair gains a fuller and voluminous appearance. It does not weigh down the hair. It greatly reduces breakage and breakage in hair strands. Application: Apply to the hair in sections, starting from the hair roots. Massage from roots to ends. For more volume and care effect, let your hair dry and then reapply. Do not rinse. Style as usual.