Designed specially for blondes, this purple-hued shampoo fights brassy, yellow tones that creep up in lighter hair colors and highlights. Formulated without SLS or SLES, this nourishing formula tones and cleanses to leave your hair looking fresh. About KYN KYN aims to simplify your routine with products that improve the health and vitality of your hair. Using clean, quality ingredients and avoiding common irritants think SLS, sulfates, parabens, and phthalates each formula is designed to work with and enhance all hair types.