With i-23 Complex. Truer color 2x longer (Laboratory tested. Hair color stays truer twice as long as shampooing with typical sulfate ingredient shampoos.). To vitalize & preserve color-treated hair. 100% sulfate-free. Proven Beauty: Protect your color-treated hair from harsh detergents that can cause fade-out. Now you can extend the life of your hair color up to 2 times longer (Laboratory tested. Hair color stays truer twice as long as shampooing with typical sulfate ingredient shampoos.) than before with Infusium 23"s new sulfate-free formula with color preserving power. Infusium 23 does it all with an integrated system of proven science, exclusive technology and personalized products that transform hair for better-than-ever hair days. Cleanse & Care: Start with Infusium 23 Color Defender Shampoo. Gentle, sulfate-free formula preserves color longer, optimizing color vibrancy and healthy hair shine. An i-23 complex enriched with pro-vitamins, proteins and amino acids nourishes color-treated hair, leaving it enriched, enhanced and resistant to fading. Not tested on animals. Made with hypoallergenic ingredients.