Regain by Absolute New York will disperse thousands of tiny hair-like fibers that will match your existing hair color, and bond with your own hair to conceal thinning and create a more natural-looking, thicker, fuller head of hair. The secure bond stays put all day (and night) even in rain, wind, and perspiration. It won't come off until you wash it out. Safe, secure, and undetectable as close as two inches away. Evenly distribute fibers onto thinning patches of clean, dry hair. For overall coverage, run applicator across hair, building to desired fiber volume.