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Hair dryers, curling irons, and flat irons are all key for achieving an elevated hair look. The only problem? Heat is one of the most damaging elements for your hair, contributing to everything from frizz to dullness to breakage. Happily, there’s an incredibly simple fix—applying a heat protectant. “Heat protectants act as a protective barrier between your hair and a hot tool, protecting it from burning, drying out, and becoming dull,” explains celebrity hairstylist Alex Brown Glover. “It will also help smooth the cuticle and leave hair looking shiny and healthy.”

There are numerous formulas and formats (sprays, oils, and more), so how do you determine which is right for you? Our Byrdie testers and editors (who have a variety of hair types) tried 133 products over several months, using them before any heat styling. They weighed in on the most important criteria: ease of application and distribution, absorption, and, of course, just how well it protected hair from heat. From sprays to creams, and with options for everything from fine hair to tight curls, these are the best heat protectants available today.

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