KERASTASE L'incroyable Blowdry Serum - Strong Hold Hair Serum, Provides Heat Protection up to 450°F, Controls Frizz

I got this as a gift years ago and I've been using it ever since! I have wavy hair and often blow dry is straight, use flat irons and curling irons. My hair remains healthy! Don't know why, but since using this product I don't have to use anything else fory hair to get straight without being frizzy. That might not be the result for everyone, but it's certainly my experience. It is worth every penny and the bottle last me a long time.

I have very thick, medium brown hair with natural curl. I highly prefer my hair to be straight but it takes forever to do and it seems there's always an area where a dent remains (where I just cant seem to get close enough to the root to straighten). I saw this product advertised in a magazine and decided to try it.I have to say that I'm very impressed. I don't think it's helped to cut back on blow drying time but it has made my hair much more sleek and less frizzy. I let my hair air dry for 10-15 minutes then blow dry with a large, round brush. Then I have to use my flat iron. In the past I've had straight hair the first day but would start to get kinks the second day (from sleeping on it) that just wouldn't come out with another session of the flat iron. I'd resort to a pony tail. But with this product I wake up on day 2, and even day 3, with my hair still completely straight.This is the result I get during the non humid months. I have gotten compliments on how great my hair looks - even from my hairdresser. She said my hair looked and felt very healthy.In the summer I just can't get these same results. The type and texture of my hair is just not forgiving in humidity. I have spent hundreds of dollars on shampoos, conditioners, serums, etc to achieve great summer hair but to no avail. I will keep experimenting but in the meantime I will absolutely continue to use this product the other 8-9 months out of the year.My hair is naturally on the drier side so I am able to get by without washing it for 2-3 days at a time. Someone with finer hair may start to look greasy at the roots.

Very soft for hair and doesn't leave the hair heavy but like all good products a little pricey.

I am not a girlie girl with high-end products etc. But, I do color my hair with semi-permanent fashion colors (rockin the lavender this month). My stylist suggested using a stay in conditioner or heat protection product for swimming as a barrier to soaking in the chlorine and destroying my color treatment. This is the 4th product I tried and the winner. I really like that it is not greasy - no swim cap sneaking up as I swim laps. But now I find I use it before drying my hair and my hair is SO soft and smooth. I have super fine hair, and this finally seems to have resolving my constant static hair issues in the winter.

Great product; no frizz. Works great on short hair.

It makes hair soft and quicker yo dry but it didn't smooth my hair out. It is still frizzy! So, sorry but l did not think it was all that "incredible" like the name of the product says it is.

Good price. Great hair product.

One of my new favorite products. A coworker of mine recommended this for fine, thin hair. After shampooing I apply a small amount and work through to the ends. After blow drying with a brush my hair is smooth, shiny and manageable. I definitely recommend this product.