A leave-in treatment mask for all hair types that clinically reverses damage in 4 minutes. The K18 peptide technology works to repair damage from bleach, color, chemical services & heat – restoring strength, softness, smoothness, and bounce to hair. HOW TO USE Shampoo, do not condition. Towel-dry thoroughly. Begin with 1 pump of K18 mask and add more as needed depending on length, thickness, and condition. Work evenly into hair from ends to roots, one pump at a time, maximum dosage is 3 pumps. Let sit for 4 minutes. Do not rinse out. Then comb + style as usual (fine to add heat protectant or styling product now). Use for the first 4-6 washes, then as needed