It says that it is.
I have dyed jet black hair-it is naturally wavy, and used to be curly when I was little. My hair isn't coarse really, it's finer but thick. I would say below my chin level is aaaaaaaaaaaaaaaaaalllll bleach-I went blonde 2 years ago (don't ask) and am only now kind of recovering from it (strip then bleach)
If I don't use some kind of oil my hair goes super lyuck when air drying and no flat iron. Lumpy. I'm also a very lazy flat iron-er, lucky if I section it into two layers this stuff makes it look like my stylist gave me a blow out. Just sleeker, smoother. I still use a blow dryer, and I still use a flat iron to smooth it just looks fabulous instead of half assed now.