9 Hair Products the Pros Swear By

"My hair is fine, and my best secret for adding volume is using fiber-building powder. I especially love Toppik Hair Building Fibers ($25), as it comes in many different shades, even for a redhead like me (I use the shade called Auburn). The keratin fibers attach to your hair, adding texture and making it appear fuller. It's also super easy to use. Simply puff the product onto your roots and style your hair as desired!" — Heidorn