REVOLUTIONARY SHOCK that conforms to every step. The Nike Joyride Dual Run is designed to help make running easier and give your legs a day off. Small foam beads under the foot fit your foot for cushioning that resists your mileage. Small foam beads are contained in 2 compartments under the heel and the middle part of the foot. Compress and adapt to your every step for better impact absorption and stable feeling. The mesh wraps around the foot in a lightweight support. Allows air to flow freely for cooling comfort. Durable rubber is placed outside in high wear areas. Raised nobles add traction. Durable and lightweight foam cushions the forefoot for smooth transitions.