What it is: A rich conditioner with Keratin, Provitamin B5 and Shea Butter that thoroughly moisturizes, detangles and leaves hair shiny and easy to manage. The unique Quat Complex protects the hair during heat styling and prevents breakage. What it does: Keratin Smooth Conditioner is a plush, rich moisturizing conditioner that smoothes frizz, fluff and flyaways. Like its name says, it's infused with keratin, a fibrous protein found in your hair and a key building block. This means this conditioner especia