Olaplex no9 Bond Protector Nourishing Hair Serum 90mlWhy It's Cult The bond building brand that needs almost no introduction, OLAPLEX has been repairing our dry and damaged manes since 2014 (and were all the better for it, to be quite honest). Joining the ranks (and our hair care collection) is the brands very first leave in serum, the ever so protective No. 9 Bond Protector Nourishing Hair Serum. Pollution can damage our hair on the daily (think: dull lengths, breakage, frizz the list is endless), but