A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color- chemical services and heat* – with immediate and lasting results to restore strength- softness- smoothness and bounce to hair. Benefits: K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching- color and chemical services + heat*. pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state Cream format enables easy- lightweight application across all hair types- with detangling and softening benefits Vegan- color-safe- cruelty-free Takes damage repair further – reconnects both polypeptide chains (and as a result- also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive- lasting damage repair Restores hair from even extreme damage - by working at the innermost layer of the hair- core strength and elasticity are renewed for strong- smooth- bouncy hair Delivers immediate and lasting results – hair is repaired from the first use and lasts past your next wash- for ongoing reparative benefits Simplified repair - convenient- leave-in formula works in just 4 minutes- with no extra rinse required Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same)- this product is effective on all hair types How To Use: Shampoo- do not condition. Towel-dry thoroughly Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your length and density- starting at the ends and working up towards the roots Let sit for 4 minutes. Do not rinse out. K18Retail Comb- add product + style as usual. Use for 4-6 washes post-salon service- then as needed.