Matrix Full Densityhair thickening conditioner works on the surface of each strand to expand its diameter, leaving hair feeling thicker while reducing breakage. Formulated with a blend of Biotin, Zinc PCA & Gluco-Omega results in fuller-looking, thicker-feeling hair. Directions: After Full DensityShampoo, massage into wet hair. Leave on 1-3 minutes. Rinse. In case of contact with eyes, rinse them immediately. For maximum results, use the Densifying Spray Treatment to instantly work on the surface of existing strands and expand the hair diameter. Hair feels thicker. Breakage reduced. Nourishes,gives body and adds shine.