Fact: Anh Co Tran’s signature lived-in wave is so popular, the celebrity hairstylist had it trademarked. The effect is one you’ve probably re-pinned onto your Pinterest hair inspiration board, or double-tapped on Instagram and its undone, touchable appearance is coveted by cool girls everywhere—including Emily Ratajkowski, who coincidentally played Ben Affleck’s “cool girl” love interest on Gone Girl.

During Tran’s most recent trip to New York City, we caught up with him at Roman K Salon to find out his secrets to creating the perfect lived-in look. For starters, a solid blowout is a must. “I buffer the hair with Oribe’s Balm D’Or ($43; oribe.com) to help smooth and protect fro the heat,” he tells InStyle. “Depending on the hair texture and density, I rough dry the hair anywhere from 20 to 100 percent dry, and once that is complete, I smooth out the hair using a boar bristle round brush.”