This is a full set of the K18 line including 5 travel size masks. Professional purchase from my Beauty Supply Store. ** I used the hair mask once, you don't need to use a lot of this. The Peptide Prep and Hair Mist are new. ** Info from K18: "Peptide Prep™ Pro chelating hair complex • A concentrated cocktail of chelators targets the most common minerals and metals for a deep demineralizing refresh in minutes. No mixing or no extra rinse required. • Resets hair for optimal chemical and color services, ensuring even color + lift, preventing unexpected chemical reactions. Restores bounce and shine, and improves the effectiveness of products like K18 molecular repair formulas. PRO Mist • Leave-in, lightweight mist—powered by the K18PEPTIDE™—strengthens hair’s defenses and improves resilience prior to damaging salon services. • Designed to be the first step in the K18 molecular repair service, the PRO Mist is a simplified formula without added emollients. Its pH level of 7.5-8.0 allows for optimal application prior to chemical or salon services. PRO Mask • Leave-in treatment mask repairs hair damage and restores hair to a healthy state after salon services. This mask is clinically proven to repair damage from bleach+color, chemical services & heat* for immediate lasting results. • The cream-based format helps soften and detangle. Return to resilience with our pH-optimized (5.0-6.0) formula engineered to minimize cuticle swelling + restore hair proteins. D2306