The best time for people to switch from a standard face mask to an ulta mask, depending on the condition of the skin, is usually after 8 to 12 hours of rest, according to a study by the European Union.
The study found people are more likely to use an ultas mask after a night out, when they are tired and in pain, or during a cold shower or shower without soap or water.
The skin should be hydrated and free of signs of inflammation.
The researchers looked at nearly 200,000 adults aged 18 to 70, who reported using a standard mask to treat their skin conditions and who were asked to report on their current mask use and the mask they were using.
They then compared the masks that people used with masks that they had previously used.
The study was published online this week in the journal PLOS ONE.
The findings showed people are less likely to switch masks, but they are still using the masks more frequently.
People who had used a standard facial mask more often were more likely than those who had not to switch back to a standard one, the researchers found.
People who had previously switched to an alternative face mask were more than twice as likely to keep their masks, the study showed.