A leave-in treatment mask for all hair types that clinically reverses damage in 4 minutes. The patented one works to repair damage caused by bleaching, color, chemical services, and heat, restoring hair's strength, softness, smoothness, and bounce. How to Use: Wash hair with daily use shampoo. Do not use any type of conditioner. Dry hair well with a towel. Apply 1 pulsation of the K18 mask. Add more pulses according to the length, thickness and condition of the hair. Distribute the product evenly on the hair, from the ends to the roots and leave it on the hair for 4 minutes to activate. Do not clarify. Comb the hair.