Toppik Hair Building Fibers Black covers thinning hair and grays. Fills in areas to look natural and stay in pace. Will not flake. Easy to wash out. Covers grays. Created with natural keratin fibers. For use by women and men. When caring for your hair always remember to decrease the temperature of your water when washing. Wash hair less often, as over washing will fade color, dry hair, and cause breakage. Always gentle cleansing shampoos heat protecting products for styling, and brush hair prior to washing and prior to going to bed. Make sure to use hair treatments masks at least once a week for moisture, color protection, scalp health and shine enhancement depending on your hair type. Try to avoid products with harsh sulfates (SLS or SLES), harsh parabens, sodium chloride, and petrochemicals.