Summer is around the corner, and when it comes to sunscreen, it’s important to know how to stay covered.

Yet new research published in the Journal of the American Academy of Dermatology shows that many Americans aren’t protecting their skin as much as they should. Researchers from the Centers for Disease Control and Prevention (CDC) asked people how often they use sunscreen when out in the sun for over an hour and only 14% of men said they regularly slathered on sunscreen. Women, at 30%, were twice as diligent about putting on sunscreen—while men were more likely than women to report never using sunscreen.

The problem isn’t only compliance. The Environmental Working Group (EWG) released its 2015 sunscreen guide on Tuesday, which reviewed more than 1,700 SPF products like sunscreens, lip balms and moisturizers. The researchers discovered that 80% of the products offer “inferior sun protection or contain worrisome ingredients like oxybenzone and vitamin A,” they say. Oxybenzone is a chemical that can disrupt the hormone system, and some evidence suggests—though not definitively—that adding vitamin A to the skin could heighten sun sensitivity.

The report points to Neutrogena as the brand most at fault for promising sun protection without delivering. The EWG says that Neutrogena claims its baby sunscreens provide “special protection from the sun and irritating chemicals” and is labeled “hypoallergenic,” but it contains a preservative called methylisothiazolinone that has been deemed unsafe for use in leave-on products by the European Commission’s Scientific Committee on Consumer Safety. The company also boasts of high SPF levels like SPF 70 or SPF 100+, even though the U.S. Food and Drug Administration (FDA) says there’s only notable protection up to SPF 50, the report adds. Neutrogena did not respond to requests for comment by publication time.

In the new report, EWG also provides a Hall of Shame of products that don’t deliver on their sun protection promises, as well as a database for users to search how protective their particular sun products are—and find one that works.

To stay protected this summer, the researchers suggest, use sunscreens with broad spectrum SPF of 15 or higher, limit time in the sun, wear clothing to cover exposed skin and re-slather your sunscreen every couple hours.

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