The Nike Joyride Dual Run is designed to help make running feel easier and give your legs a day off. Tiny foam beads underfoot conform to your foot for cushioning that stands up to your mileage. Small foam beads are contained in 2 compartments under your heel and midfoot. They compress and adapt to your every step for better impact absorption and a stable feel. Up with enhanced breathability, the mesh wraps your foot in lightweight support. It lets air flow freely for cooling comfort.Durable rubber is placed on the outside in high-wear zones. The raised nobs add traction. Durable, lightweight foam cushions your forefoot to promote smooth transitions.