Echosline Anti-Yellow M6, 500 ml, Hair Masks for Women, The Echosline Anti-Yellow hair mask is an essential step in your hair care ritual. Give it a moment to regenerate and it will repay you with vitality and beauty. Characteristics: neutralises yellow undertones in your hair gives hair a brilliant shine hair is soft to the touch How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.