Toppik Hair Building Fibers instantly make thinning hair look thick and full. Its Keratin fibers cling to existing hair and, in seconds, fill in all thinning or balding areas. Toppik won't come off in wind, rain or perspiration. It is totally undetectable, even from as close as two inches. All you will see is thicker looking hair! This is a 30 day supply. This item is a Final Sale.