How long does period underwear last?

With proper care, a pair of period underwear lasts about two years or more — often through 50 to 100+ washes. That long lifespan is exactly why it saves money compared with buying disposable pads every month.

To get the most life out of it, rinse cold before washing, wash cold, skip bleach and fabric softener, and always air dry instead of using a tumble dryer.