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. Add strength and shine to locks with the Living Proof Perfect Hair Day (PhD) 5-in-1 Styling Treatment. In just one easy step, the formula works to smooth, volumise, condition, strengthen and polish tresses, using the brand’s patented Healthy Hair Molecule and Thickening Molecule.The nourishing treatment delivers nutrients and hydration to hair, taming frizz and preventing breakage for a softer, more supple hair fibre. Delivering heat protection up to 230°C, the colour-safe formula will leave locks full of bounce, shine and visible health.Safe for coloured and chemically-treated hair.