This serum is THE best anti-frizz product on the face of the planet. I'm a hairdresser, and I do Brazilian Blowouts in my salon, and I always finish off the service by applying this product. When I first heard it was a serum, I was a bit hesitant because I figured it would be heavy on my fine hair, but it's not at all! It has the consistency of a light lotion...but for your hair! I've never gotten a Brazilian Blowout myself, but I use about a quarter-sized amount of this product whenever I'm finished washing my hair so that my curls are frizz-free and beautiful as they air-dry. It's activated mostly when you apply some sort of heat, but I find that you can use this stuff on wet, damp, or dry hair and it works just fine. Pricey, but so so so worth it!