Toppik’s Hair Building Fibers – Medium Brown provides hair with a natural, fuller appearance in seconds. Formulated with natural Keratin Protein, the fibers adhere securely to existing hair, effectively concealing thinning areas and enhancing overall hair thickness.Resilient against wind, rain, and sweat, these fibers guarantee a hassle-free experience for both men and women. Easily removable with shampoo, they seamlessly fit into any hair care routine, making fine hair look effortlessly dense and voluminous. Size:1.94oz