For dry or stressed hair. this is a 5 week long lasting moisturizing treatment. Immediately after using NIGELLE HY your hair will feel healthier and softer. The new nano hair hydration technology also adds shine and body without weighing the hair down. Applied after any chemical treatment. Your new hair with HY will look more radiant and feel perfectly smooth all the way to the ends. NIGELLE HY delivers a double veil of the sheerest hydration to keep the color fresh longer with your 4 week home care maintenance kit.