These flip-flops are totally awesome and gender-neutral, too! Textured thong-strap upper. Firm EVA foot bed. Textured EVA foam outsole is partially made with renewable sugarcane. To measure your shoe size, place a piece of paper on the ground. Stand barefoot on the paper. Using a pen, draw an outline of your foot. Use measuring tape to measure the length of your foot on the paper. Spot clean.