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 especially good if your hair is dry or damaged. Our Quat Complex strengthens strands and helps prevent breakage. Provitamin and shea butter moisturize and strengthen your hair from the inside out.