This 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 Hair like new. This leave-in mask heals and strengthens hair with lightweight moisturizing benefits to detangle and keep hair smooth and soft, without weighing it down. Please see dosage chart for exact usage. For best results, use for the first 4-6 consecutive washes following a service, and then every 3-4 washes as needed to maintain hair strength. K18Peptide™ is the miracle molecule haircare was waiting for. Clinically proven to reverse damage in just 4 minutes. 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, one pump at a time, from ends to roots. Let sit for 4 minutes to activate. Do NOT rinse out. Style as usual. You’ll discover: Like-new hair repaired from the inside out Healed damage from bleach, color, chemical services, heat, and mechanical styling Restored strength, softness, smoothness, and bounce Reduced breakage, split ends, and color fade pH balance of 5.0-6.0 Doesn’t wash away with shampoo, leaving lasting results 91% original strength* 94% original elasticity* Vegan Color Safe Cruelty-Free