Toppik Hair Building Fibers are made from keratin protein fibers, the same protein that makes up human hair. These microfibers electrostatically cling to existing hair strands, instantly making hair look thicker and fuller. They are designed to blend seamlessly with your natural hair color, effectively concealing the appearance of thinning areas and scalp show-through. These fibers are a great solution for instant cosmetic enhancement for individuals experiencing hair loss or thinning. They offer a natural-looking remedy that is resistant to wind and light rain, providing confidence throughout the day.