The Nike Sock Dart Unisex Shoe knocks your socks off with a soft upper that surrounds your foot in comfort and just enough structure to add stability. Flexible, breathable mesh helps keep your feet cool and comfortable, while the molded midfoot strap with adjustable closure provides a personalized fit. Full-length Phylon foam underneath your foot offers lasting, cushioned comfort. Rubber outsole for durability. Flex grooves let your feet move naturally.