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 + colour, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair. Benefits: 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 all ha