Editor's TipEditor's Tip

To turn up the volume, pre-treat your hair with Kérastase’s densifying Age Premium Bain Substantif.

Kérastase

Birchbox Breakdown

As the years go by, it isn’t just our skin that starts to show our age. Our hair follicles become weaker and more porous with each passing year, leading to everything from breakage and thinning to overall dryness and dullness. That’s where this hydrating hair and scalp mask comes in. Its targeted formula helps reverse signs of aging to leave hair softer and stronger. Designed to be used weekly, it’s great for ladies of all hair types and textures.

How it Works

This one-of-a-kind mask rejuvenates hair with a host of actives. First, Kérastase’s patented Intra Cylane™ molecules wrap around each fiber in order to boost volume. Next, a calcium derivative fortifies hair from within, while vitamin F and moisturizing ceramides repair follicles at the cellular level. Pomegranate extracts and UV filters prevent free radicals from further damaging your locks. Finally, hyaluronic acid counteracts scalp dryness by creating a lasting moisture shield.

How to Use

After you get out of the shower, towel-dry your hair and smooth on a small amount of the mask, starting from your scalp and working section by section. Let the mask sink in for five to ten minutes. Step back in the shower, and wash away with warm water, followed by a rinse of cool water to seal in shine.

More for You!
  • Product orders $50+ and all monthly box brands ship free
  • Free returns within 90 days of purchase
  • Extra samples and gifts in the Bonus Shop

Product Reviews & Sample Feedback

3.9 out of 5 stars, based on 94 reviews 94 Reviews
3.9 out of 5 stars
5 Star
34
4 Star
32
3 Star
14
2 Star
8
1 Star
6
Hair type
Curly
Dry
Fine
Frizzy
Kinky
Normal
Oily
Straight
Thick
Wavy
Hair color
Brown
Blonde
Black
White or gray
Red
Other
Age
17 & under
18-24
25-34
35-44
45-54
55 & over
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Most Helpful Customer Reviews

perfect conditioner

I have long straight hair, not super fine, but definitely no where near course. This conditioner was the thing that finally got me to wash my hair every other day.
I was a daily washer before I found this. My scalp gets greasy, but my ends are dry. This conditioner strikes the perfect moisture balance. I use it daily.

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Meh, only ok

It makes my hair reasonably soft, but I haven't seen any long-term benefits. It hasn't improved the thickness of my hair or the number of strands that fall out. Not worth the price.

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My hair is so soft

I normally do not use a rinse or mask. It I love how my hair feels with this product. I have been using every other hair washing.

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Just ok

I purchased this product because it promised to help my dry, "aging" hair. First of all the smell was not so great. Secondly, I don't think it worked all that well. Honestly, I prefer the Kerastase Chroma Captive product.

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Great conditioner

I have thick, porous hair- and this line of Kerastase products is the best for adding softness and a healthy smoothness. This is a heavy conditioner- but it rinses clean. I love this and also the shampoo from this 'purple' line.

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Less shedding, More Volume!

I bought this for my mom, along with the rest of the age premium line, and it seems to be working. My mom had been complaining that her normally dry, color treated, think, wavy hair was feeling ultra dry, light, thin, and beginning to shed WAY more than usual. Since using the age premium line, we both noticed that her hair seems fuller, softer, and less tangled. I've definitely noticed, since the first time she used it, that she's been shedding much less. It's quite a bit more expensive than other hair lines, but so far it has been worth it. I will most definitely keep purchasing this for my mother, as long as she's happy with it.

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Love it!

Great mask. Left my hair feeling smooth and shiny. I love that it didn't leave my hair feeling greasy! I will definitely be using it for a long time!

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Awesome

This product is great; I love it and will buy it again and again. It's the best hair treatment I have found.

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Great Stuff!

My hair was damaged from years of coloring. This product truly moisturized my hair without making it appear greasy. I would highly recommend it!

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Softened Chlorine, sun bleached hair

My daughter used this product after a summer of sun and chlorine in her hair. Immediately we could tell it softened and moisturiized her hair. The sample didn't provide enough to see long-term affects though.

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