Leave-in thickening treatment transforms fine, thin hair into thicker, fuller hair in a single blow dry, Color Wow Dream Cocktail Carb-Infused Leave-in Treatment is a Leave-in thickening treatment transforms fine, thin hair into thicker, fuller hair in a single blow-dry. Makes a major difference with just one blow dry. Instantly adds mass by bonding a weightless carb-based complex to hair’s surface. Heat protectant