My long hair was in such awful condition that I was planning to get it cut short. I used this Kerastase Resistance Fibre Architecte twice and can't believe the difference. I now have a lot fewer fly-aways, and my hair looks, and feels, healthy and silky. I can't stop patting it! I'm buying more already because I can't bear the thought of running out. awesome product, and I try everything!

This Kerastase Resistance Fibre Architecte 30ml leave in reconstructor is one of the best I've ever used. It's comparable with RX from Keratin Complex Coppolla. I really recommend both of them. They do miracles!

My over bleached, dry, broken hair is really on the mend now after using this Kerastase Resistance Fibre Architecte. I wouldn't use any other product now, it's brilliant.

Excellent product! Because I've got such a long hair it was getting quite dry, with split ends. The Resistance Fibre Architecte really does make your hair look healthier, fuller, soft and shinny without creating that greasy heavy feeling that most products do. To apply anytime a day. A must have!

Leaves hair feeling super soft and smooth. I had problems with my blonde hair while pregnant and this serum made it silky and soft. Love it!