ion keratin smoothing shampoo 1lt.(33.8oz) ion ion keratin smoothing shampoo is a gentle sulfate-free formula that replenishes keratin protein, strength and lost moisture for smoother, more manageable hair. eliminates frizz, restores elasticity and helps repair breakage while preparing hair for easy, fast blow-drys. improves and prolongs the results of any keratin smoothing treatment and is also safe for use on natural, chemically-treated or color-treated hair. from volumizing to smoothing, moisturizing to color-protecting, ion shampoos, conditioners, and treatments are formulated to provide impeccable, professional results for all hair types.