The basics Toppik FiberHold Spray is a fine mist designed to strengthen the bond between Toppik Hair Fibers and your existing hair, producing longer-lasting results.  The benefits Also helps Hair Fibers resist wind, rain, and perspiration. The uses Toppik FiberHold Spray is the perfect finishing step after applying Hair Fibers for natural-looking shine. The bottom line Intensifies the hold between Hair Fibers and your hair, ensuring longer-lasting results.