We put the K18 professional molecular repair hair mist to the test with K18 educator + PRO stylist Andrea Yeager. Through the damaging bleaching process, you can see hair degrading with compromised hair strength + elasticity. The tress with K18 PRO mist tells a different story. Powered by the patented K18PEPTIDE™, this PRO-exclusive damage repair spray reverses existing damage, and helps prevent new damage before each round of bleach. The result? Stronger, more resilient, and healthier hair, even after 5 rounds of bleach.