How To Tame Frizzy Hair

Frizz is mostly caused by a lack of moisture in your hair but humidity can also contribute to it. Here's how it occurs: "Your hair loses moisture throughout the day, so midday, the cuticle [the outermost layer on your strands] opens up and lets the outside air in, creating a frizzy mess," celebrity hairstylist Mark Townsend explains. Townsend, New York-based stylist Mark Garrison, and Ursula Stephen, who does Rihanna's and Kerry Washington's hair, offer up their tricks for fighting frizz.