Toppik Hair Building Fibers are made from keratin protein, the same protein that naturally makes up your hair. These fibers electrostatically cling to existing hair to instantly create the appearance of thicker, fuller-looking hair. They are designed to resist wind and rain, providing a natural, long-lasting solution for thinning areas. Simply shake the fibers onto the desired area for an immediate cosmetic improvement in hair density. Ideal for seamlessly blending with light blonde hair to conceal the look of hair loss or sparse areas, offering confidence throughout the day.