Approx 1/5 of the bottle used this ultra-violet shampoo tones unwanted brassy hues, while resulting in 7x more repair, 55% less breakage, and stronger, healthier-looking hair. who it's for all blondes, grays, and silvers 1-4c, + high porosity hair why it's special wash your way to a brighter + healthier looking blonde! packed with bond cure technology, quinoa protein, plant butters, and ultraviolet pigments, this purple shampoo keeps your blonde lookin' cool and strong. the proof is in our claims - bust your brass cool blonde repair shampoo is clinically proven to tone, hydrate, strengthen + repair hair, resulting in 7x more repair* and 55% less breakage​.* *after 1 use when used as a system, clinically tested. brightens + tones - brassy hues don't stand a chance. this conditioner brings out the best and brightest shades of blonde, silver, and gray. wash your way to stronger hair - bust your brass strengthens + repairs damaged hair while helping to prevent future damage.