Biolage Essentials ColorLast, 100 ml, Hair Masks for Women, The Biolage Essentials ColorLast 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: moisturises intensely restores hair structure strengthens the hair fibre goes deep into the hair fibre extends the life of hair dye How to use: Wash with shampoo, then apply to damp hair. Leave to act as instructed on the packaging, then rinse thoroughly.