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💫 Unlock your hair’s full length potential with every wash!
Kérastase Fondant Extentioniste Conditioner is a creamy, deep-conditioning treatment enriched with Creatine R and Ceramides. Designed specifically for long, fragile, and damaged hair, it detangles, seals cuticles, and enhances shine while promoting moisture retention. Ideal for use with the Extentioniste shampoo and mask, it supports healthier, stronger hair lengths and visibly reduces breakage.

































| Customer Reviews | 4.6 out of 5 stars 3,640 Reviews |
M**O
It works
It works, im happy
P**Y
Love it
Absolutely love this…it last along time you only need a pea size amount my hair is medium length
G**I
Perfect
This product let my hair looks shiny and soft and the smell is very good
L**E
Excellent but pricy
Love this ptofuct
Y**Ú
Kerastase
Sentí que me dejaba el pelo un poco duro. Quizás por mi tipo de pelo.
F**K
Definitely recommend
Love this product
A**N
Does the job.
This is a conditioner that really goes beyond what most conditioners do. I have really thick hair, and use about 1/2 oz after shampoo. I leave it on for a few minutes and rinse. My hair feels silky immediately, and after blow drying. The stuff is amazing. Glad I found it, and am looking into their other products
H**M
Missing Seal
I like this product. I’ve ordered it many times. This time when I got it, the seal was missing. There’s a lot of counterfeit items on Amazon now so this has me a bit sketched out.
Z**I
Healthy conditioner for hair
Best conditioner ever really it’s amazing it changed my hair from a to z thanks kerasstase so much flair original product
E**Z
Excelente
Si ayudo mucho para que me pudiera crecer, incluso mi estilista me comentó lo mucho que mejoró mi cabello
خ**ه
👍
👍
D**O
Amazing
Amazing as usual 🌷
S**M
Excellent for long hair
This is my go-to conditioner. I use the shampoo too. I have long hair and this has brought it up nice and thick. It's cheaper than buying in the hairdressers, which is great, as they charge almost double. I can't say it has a distinctive smell to it, which is a shame, but it is really good for the hair.
Trustpilot
1 month ago
3 weeks ago