This Natural Keratin Treatment Got Rid of My Frizz But Let Me Keep My Waves

I have a lot of hair. It's thick, long, naturally wavy (2B S-curls, to be specific), and, for the past two years, bleach blonde—a high-maintenance decision that is laughably at odds with my aggressively low-key approach to haircare. This always feels most apparent during my touch-up appointments at L.A.'s Mèche Salon: My color guru (and friend) Matt Rez chides me a little for being terribly lax with my Olaplex treatments, I sit as he painstakingly highlights my ridiculous mane, and roughly six hours later, I'm on my way with the hollow promise to take better care of my strands. Wash, rinse, repeat.

It is thus unsurprising that my hair's natural texture is as inconsistent as my commitment to maintaining it. On a good day, my hair air-dries to a pile of soft, defined waves—the kind of beachy texture that others might use a wide-barreling curling iron and a bottle of salt spray to obtain. But on a bad day, which is really an average day, it's poofy, dry, and shapeless; a mess that no amount of Shu Uemura Essence Absolue ($69) can rescue.

So when, during one of my more recent color appointments, Rez suggested that I try out a natural version of a keratin treatment called Cezanne—assuring me that it would allow me to maintain my natural waves, sans frizz—I leapt at the chance of getting next-to-perfect hair without having to sacrifice any of my laziness.