Extend the life of your hair colour with this Redken Color Extend Magnetic Mask Duo. Working by attracting to colour molecules, this mask traps them into the hair fibre which helps to preserve colour richness and give you that fresh from the salon vibrancy for longer.Directions of use:- Apply to wet hair and leave in for 5 to 15 minutes depending on the condition of your hair. - Rinse thoroughly. - Can be used weekly or daily if needed.