Introducing Acidic Bonding Concentrate 24/7 Night & Day Serum, Redken's 1st bonding serum for 24/7 hair repair that never sleeps, in a convenient travel size format for hair repair around the clock.This revolutionary serum delivers unparalleled bond repair and protection for damaged hair. Tossing and turning in bed, and rubbing against the pillow nightly may cause friction that stresses the hair fibre, resulting in hair damage. The groundbreaking formula harnesses the power of Citric Acid, penetrating 7 layers deep to help strengthen and combat daily and nightly damage. Combined with the high leave-in concentration of Polyglutamic Acid and Squalane, this serum magnetizes to the hair to prevent breakage and help to repair the hair fibre, creating a long-lasting shield against aggressors.Combat daily damage overnight and wake up to visibly healthier, stronger, 3x softer*, and 11x shinier hair** with up to 89% less breakage*. This lightweight serum absorbs immediately into the hair upon application leaving no visible residue, leaving hair smooth and soft after just one use. 92% agree hair looks and feels healthy after 24 hours***.Beyond its powerful repair properties, this serum elevates your hair care ritual with its captivating fragrance. A blend of Acidic Bonding Concentrate's signature citrus scent and soothing lavender notes creates a luxurious and relaxing experience, perfect for both daytime and nighttime application. For damaged, processed hair of all hair types and textures, Acidic Bonding Concentrate is your ultimate solution for hair that needs intense repair and protection.*Instrumental test. shampoo, conditioner, and serum vs. non-conditioning shampoo**instrumental test vs. non-conditioning shampoo ***based on consumer test results, 60 women