Bioré Blackhead-Reducing Witch Hazel Pore Strips target blackheads and unclog pores for healthy looking skin. Convenient and easy to use, these nose strips can be used once a week for the deepest clean. Only Bioré Ultra Cleansing Pore Strips use patented C-bond technology to bind to blackheads and impurities, NOT to skin to safely and effectively remove dirt, oil, and even stubborn blackheads. Bioré pore strips instantly clean and unclog pores to purify your skin for the deepest clean in just 10 minutes.