The Toppik FiberHold Spray is specifically formulated to enhance the static charge of Toppik Hair Fibers, significantly strengthening their bond to existing hair strands. This application ensures maximum resistance against wind and light rain, locking the fibers in place for a longer-lasting, thicker appearance. Use this professional-grade spray as the final step after applying hair fibers to secure the results throughout your day. It provides an extra layer of hold, delivering confidence in the fullness and density of your hair.