What it is:Step 1 (Cleanse/Nourish) conditioner in ghd's 4-step thermodynamics(TM) system: A moisturizing conditioner for color-treated hair with UVA and UVB protection.What it is formulated to do:Helps preserve the vibrancy of color-treated hair while enhancing elasticity and shine. Infused with a UVB absorber (to protect the hair from UV damage and preserve the hair's natural surface proteins and lipids) and a water-based silicone that works with polymers (to help retain color). The addition of hydrolyzed vegetable protein provides intensive conditioning and resistance to high humidity, which helps to control frizz.