K18 leave-in molecular repair hair mask 15mlThis patented bioactive peptide treatment strengthens and improves elasticity while reversing damage from chemical services, thermal styling, and mechanical styling. For all hair types. REPAIRS DAMAGE CAUSED BY Bleach + Color Heat Chemical Services Mechanical Styling How to use Shampoo, do not condition. Towel dry thoroughly. Begin with 1 pump of K18 Mask and add more as needed depending on the length, thickness, and condition. Work evenly into hair,