Ideal for most hair types.
Color safe and safe for chemically treated hair. It is sulfate-free, silicone-free, paraben-free, phthalate-free and cruelty-free. Living Proof Perfect Hair Day (PhD) Shampoo 2oz Living Proof Perfect hair Day (PhD) Shampoo is a revolutionary shampoo that helps deliver beautiful healthy looking hair, while helping hair feel cleaner, longer.