Toppik Hair Building Fibres are electrostatically charged keratin fibers designed to cling to existing hair, instantly making it look thicker and fuller. These microfibers blend naturally with your own hair color to effectively conceal thinning areas, receding hairlines, and even cover up the base of braids or root regrowth. This application provides a natural appearance and is simple to use, offering an immediate cosmetic solution for perceived hair loss or thinning. They are resistant to wind and rain, providing a reliable solution throughout the day.