I got the OLAPLEX Nº.9 Bond Protector Nourishing Hair Serum in my Fab Fit Fun box and have already purchased a new bottle during the Cyber Monday sale. This stuff is amazing when used before a blowout and curling. It works nicely if you air dry too, but I wasn't totally wowed until I used it before I heat styled my hair. Read on to see what sets this serum apart.