You invested a lot of time and money into getting your hair to the color you're happy with, and you're not going to let that get ruined by non-color-friendly hair products. Matrix Biolage COLORLAST Conditioner is just the solution you need to protect and deep condition your color treated hair. The low pH formula in this product keeps the cuticles down and color locked in so that you can achieve silky, healthy locks while still keeping your salon color as vivid as the day it was done.