How long do Toppik Hair Building Fibers last?

When applied correctly, Toppik Hair Building Fibers can stay in place for up to two days, unless you shampoo or wash your hair. They should remain in your hair overnight and require minimal touch-ups in the morning. Expect a 12g bottle to last around 30 days with daily use, and a 27.5g bottle to last about 60 days.