If you were a biker, you’d likely join a motorcycling association, like the Latin American Motorcycling Association (LAMA), of which Costello is a part of. “Most biker crews have a dress code,” she says, adding that it usually consists of a black shirt, jeans, and a biker jacket or vest. While it’s tempting to pair a moto jacket with a skirt or dress, Costello says that real biker style sticks to a no-skirts policy. “I find myself not being able to dress up as often as they used to,” she says. “I’d rather be on my bike than wear a dress.”