-The world's first solid purple shampoo bar with Biotin!-Safe for blondes, grey & white hair: color-treated, highlighted, & natural.Why You'll Love This:-Neutralizes unwanted brassiness and yellow undertones.-Enriched with Biotin to boost shine, reduce dullness & strengthen your hair-Enjoy smoother, stronger & more vibrant blonde hair after just one use! -PH balanced and safe for color-treated hair-Free of parabens, phthalates, silicones, sulfates, & artificial fragrance-Reduces single-use plastic: saves two bottles of liquid shampoo/conditioner-Made in the USA with quality ingredients4OCEAN CERTIFIED: For every shampoo or conditioner bar, 4ocean pulls the equivalent of one shampoo bottle’s worth of plastic from the world's oceans, rivers, and coastlines.