I absolutely love this shampoo! Its concentrate so a little goes a long way, it leaves my hair smooth and besides of being specially made for color treated hair, its sulfate free for those with keratin treatment, plus, it smells fantastic!!

This shampoo smells amazing. It's sulfate free which I love to preserve my colour treated hair and it leaves my hair clean and silky.

I started using S-FActor when it first came out and normally I have to change shampoos after a while because my hair get used to them and doesn't do as good. But I haven't used any thing else. S-Factor is gentle but makes lots of suds with very little...

I just recently tried this shampoo, and it works great. My stylist uses these products exclusively.