Full-length foam plus arch support equals Nike's most steady ride. Supportive cushioning in the Structure 26 provides steadiness for everyday runs. A full-length ReactX midsole delivers a cushioned, yet stable transition from heel to toe off. Plus, a tried-and-true midfoot support system wraps around your arch and heel to provide a firm platform. Plush Upper - The plush collar and tongue, along with the engineered mesh upper, provide comfort, support and an improved fit. Midfoot Support - Nike's midfoot support system helps to slow the rate of ankle eversion and provides a stable platform for transition and toe-off. ReactX Foam - The full-length ReactX midsole delivers cushion, comfort and increased energy return. It's 13% more responsive than previous React technology. More Details: ReactX foam underfoot and higher stack height for stability and support Lighter, more flexible rubber in forefoot of outsole for cushioning High-abrasion rubber in heel for increased durability Reflective details Specs: Category: Stability, roads, everyday training Weight: Approx. 321g/11.3oz (Men's US 10) Heel-to-toe drop: 10mm Width: D (men's standard, medium) Replaces Nike Men's Air Zoom Structure 25