Elizabeth Giardina is certainly a busy woman. In addition to working as the design director for 10 Crosby Derek Lam, she's also been training to run in Sunday's ING NYC Marathon, taking place across all five of New York City's boroughs. Taking on the marathon is no easy task -- the first wave is scheduled to start at 9:40 AM, and will run all day as participants make their way through Staten Island, Brooklyn, Queens, the Bronx, and Manhattan. We caught up with Giardina to find out about the essentials she needs to make it across the finish line, and the fitness items she'll be taking with her to the race. Head over to our Pinterest to check out all of Elizabeth's marathon must-haves!