How do you use keratin plus hydrating hair mask?

To use a keratin plus hydrating hair mask, start by washing your hair with a suitable shampoo and gently towel-drying it. Apply a generous amount of the mask evenly from mid-lengths to ends, avoiding the scalp. Leave it on for the recommended time, usually around 10-30 minutes, then rinse thoroughly with cool water to lock in moisture. For best results, use the mask once a week or as needed based on your hair's condition.