The Nike Lunarestoa 2 Essential Shoe has a lightweight midsole and seamless fabric upper for springy, responsive cushioning and comfort. No-sew textile upper for lightweight, streamlined comfort. Lunarlon midsole with an IU carrier for springy, responsive cushioning. Rubber outsole for durability and traction. Rubber heel cage enhances durability and offers a modern look. Flex grooves let your foot move naturally.