- Christophe Robin Professional Hair Mask Shade Variation Mask 250ml - Specially formulated for brown hair seeking a cool ash brown tone - Effectively neutralizes copper, red, and orange tones, providing a natural and even finish - Composed of 96% natural ingredients, including sweet almond oil, shea butter, and plant extracts - Provides intense hydration, softness, and shine without weighing hair down - Color fades gradually in 3 to 5 washes, allowing you to adjust the intensity - Does not cover gray hair, ideal for maintaining and refreshing color between dyes - Easy application: after washing hair, apply and leave on for 5 to 30 minutes depending on the desired result - It is recommended to perform a patch test 48 hours before the first application - Avoid contact with eyes and wash hands after use to prevent stains