Any mask is better than no mask, say experts, but like everything else in life, some are better and will keep you safer than others. While people have gone wardrobe-wild with innovative masks — there is even a diamond-studded version selling for a cool $1.5 million — the plain, white N95 and KN95 respirators offer superior protection.

According to Newsweek, they filter out 95% of virus, bacteria, and other particles while allowing you to breathe comfortably. They are also more durable and water-resistant than other types of masks. The difference in designation comes from the country of origin where the mask has been certified. N95 face coverings are certified in the U.S., while KN95s are certified in China.

If the N95 mask has also been tested and certified by the National Institute for Occupational Safety and Health, it means you cannot get a better or more efficient mask. An example is the Harley Hard Shell L-288 that sells for $79.99 at N95 Medical Supplies.

A less expensive choice that has been endorsed by the Centers for Disease Control and Prevention is the KN95 face mask, an easy-to-wear respirator with comfortable ear loop hooks and an adjustable nose bridge. You can purchase a10-pack of these disposable face coverings here.

Researchers at Duke University studied the effectiveness of various masks and warned that N95 or KN95 masks with valves could actually do more harm than good, according to the New York Daily News. N95 masks with valves could encourage a strong outward flow of germs, said the researchers.

According to Fox News, the San Francisco Department of Public Health took to Twitter to warn residents that N95 masks with valves or openings in the front aren’t safe.

“Still seeing a lot of these masks out there, it is confusing, because they are called N95 — but the ones with the valves or openings on the front are NOT safe, and may actually propel your germs further!” the tweet reads, according to Fox News.

According to the Mayo Clinic, surgical masks, also known as medical masks, are not approved by the U.S. Food and Drug Administration for protection against the COVID-19 virus, but these masks may offer some protection when the more reliable N95 masks are not available.

The CDC has recommended the use of face coverings for people in public venues to prevent the spread of disease.