Powered by Living Proof\'s patented Healthy Hair Molecule (OFPMA) and Thickening Molecule (PBAE), Living Proof Perfect Hair Day (PhD) 5-in-1 Styling Treatment is a genius solution that allows you to style and treat in one step. Key Features and Benefits: - Delivers the five benefits for beautiful healthy looking hair in one easy step - smoothness, volume, conditioning, strength and polish. - Styles and treats without compromising one for the other. - Safe and formulated for colour and chemically treated hair. - Ideal for all hair types. Perfect Hair Day (PhD) 5-in-1 Styling Treatment is silicone-free.