"I have naturally curly hair, and I air-dry it while I'm on vacation," she told Harper's BAZAAR. "I use Kerastase Discipline Oleo-Curl and Moroccanoil Hydrating Styling Cream for frizz-free curls." Kidman added that she loves using natural products when she goes on vacation because there are so many options available in the beauty aisle back home in Australia! She also said that she doesn't like to use heat tools on her hair because it causes damage and turns her hair grey earlier.