If your hair is mechanically stressed or treated with gentle acid pH haircolor, spray 10-15 pumps of Redken Chemistry System 5.5 pHix pHase pHase and work into the hair. Spray 5.5 pHix pHase over any Redken Chemistry System Shot to lock the specialized ingredients contained in the shot onto the hair. It also rebalances the pH level of the hair and helps to seal the cuticle for a healthier condit