Toppik Fiber Black is a keratin-based hair-thickening solution engineered for all hair types and textures. The colored fibers electrostatically bond with existing hair strands, creating an immediate appearance of increased volume and density. Beyond everyday use, this versatile formula serves as an effective root concealer for color-treated hair, seamlessly blending with natural regrowth. The result is visibly fuller, more substantial-looking hair that maintains a natural appearance throughout the day.