The bond building brand that needs almost no introduction, OLAPLEX has been repairing our dry and damaged manes since 2014 (and we’re all the better for it, to be quite honest). Joining the ranks (and our hair care collection) is the brand’s 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 just a couple of pumps of this creates a protective layer over strands to stop pollution in its tracks. Oh and of course, it’s also supercharged with the same bond-repairing technology you know and love from OLAPLEX, ensuring it helps to restore hair to its previous glory too.