Sensi Sandals'Monte Carlo is the original, racy, thong style sandal with thin, flexible straps that move with you, for both ladies and men (unisex). Monte Carlos also have Sensi's patented, built-in drainage and filtration system for water/sand/soap. This circulates air underfoot, keeping feet cool and dry on a slip-resistant and non-marking sole. All Sensi Sandals are antibacterial/anti-fungal and machine washable. No moisture build-up which prevents mold, bacteria or mildew from growing, resulting in dry, comfortable, healthy and odor-free feet! Your forever, waterproof flip-flop.