Toppik is the cosmetic solution for fine, thin, or thinning hair. Our Hair Building Fibers give you thicker, fuller, natural-looking hair instantly. Toppik Inc. began over 30 years ago. The founder recognized that, though cosmetic products were available for virtually every aesthetic purpose, one prevalent condition never addressed was a cosmetic solution for hair loss and thinning. In fact, virtually nothing was available to simply make people with thinning hair look younger and more attractive.