After your shower, open the sachet, peel the backing off, and place it on the external skin. Smooth out any air pockets. Then go watch something, scroll your phone, read, or just lie there. After 20 minutes, peel it off and gently pat any leftover serum into the skin. Don't rinse. Go to bed.
Use it two to three times a week. Some women time it around specific moments, after their period, after sex, after a workout. Others just pick their nights and stick to them.
One box has four masks. That's two weeks at the standard routine. Most women feel a difference in sensitivity within the first one or two uses. The deeper changes, firmer skin, less reactivity, fewer bad days, build over two to four weeks of consistent use.