L'Oreal SE21 Blondifier Conditioner can be used to neutralize unwanted yellow undertones to enhance the radiance of blonde hair. Treat blonde hair with the Blondifier resurfacing and illuminating system conditioner. With a PROFESSIONAL FORMULA enriched with Açai berry extract containing polyphenols. This lightweight conditioner helps enhance the multidimentional radiance of blonde hair. Hair is shiny, soft and easy to detangle from lengths to end.