I have long hair with curl 3a to 3b with fine hair, and for blow-drying, it is very nice, as well as for leave-in, even without heat, it helps with frizz. I've had it for over a year, and it doesn't run out; you don't need a lot of product even for long hair, and in combination with an oil, it's just what you need.

Awesome in combination with Osis cream, the hair becomes shiny with volume and without frizz for days. On the fourth day, it starts to fly away because I also use dry shampoo, so I apply Moroccan oil to my ends. It's worth it for 20 euros, get it!

It does what it promises, but for the money I think there are more economical solutions that do the same job.

I will search to find something better - it smells very nice but I'm not sure if it protects the hair a lot

Okay, it doesn't work miracles, but I can say that it is one of the best live-in products because it doesn't make my hair greasy at all (I have very oily hair) and it detangles perfectly (I have fine hair that gets tangled easily). That's it. It didn't weigh down my fine hair, and I don't feel like I just came out of the hair salon as I read in other reviews

Very nice product for smooth and soft hair. I have very frizzy hair and it helps me a lot when I straighten it. I don't have a particular opinion about heat protection because, let's face it, when you use a hairdryer or straightener, your hair always gets damaged, so I don't know if it protects them enough, but it seems like my split ends have reduced a bit, so it does the job in that aspect.

Excellent. It gives "weight" to fine hair and a texture as if you came out of the hair salon after straightening, smooth and soft.

There is a lot of humidity where I live and my hair frizzes very easily. Also, I am very bad at blow-drying my own hair. I use the product before drying it and afterwards my hair is smooth and has a nice shape.

The best thing worth its money!!!
I have tried other companies... this is the best and it doesn't make the hair oily!

Awesome product that has pearl micro-particles resulting in shiny and beautifully scented hair. It only requires a minimal amount (a small hazelnut) and you comb it through the entire hair (not the roots). I have a lot of hair, unruly and dry, and it protects them perfectly from heat. It lasts for 1 to 1.5 years with twice a week usage. I don't use anything else for heat protection, only this!

It has a perfect result, leaving the hair smoother and requires a very small amount, so it lasts for months! The scent is not my favorite, but it doesn't bother me because the result is so good.

The best of all Kerastase thermiques! I have thin, long, and very damaged hair that constantly breaks, looks dull, tangles, and gets split ends. This product is a miracle. By applying a small amount, my hair easily detangles, becomes smooth, and when drying, I don't even need to straighten it. It is the best leave-in product I have ever tried

Very good protection from heat, no comparison to the commercial ones that for some reason approach it quite dishonorably in terms of price