Matrix Biolage Full Density Densifying Hair Treatment Mist created for those who have thin hair and wish to add density and style to their hair. Matrix Biolage Full Density Densifying Hair Treatment Mist helps to add thickness to each strand, creating a fuller and denser appearance. Enriched with biotin, zinc PCA and a specialized omega blend, Matrix Biolage Full Density Densifying Hair Treatment Mist helps to strengthen and protect your hair.