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Straight hair: Step 1

You probably didn't think straight hair could get frizzy, right? Wrong. Even though straight hair tends to be thin and fine, that also means more flyaways during dry weather.

Frizz prevention starts in the shower. "Straight hair can be washed either at night or in the morning," Prieto says. Just remember to use a small amount of conditioner and rinse with cool water to seal the hair cuticle.