The Structure 26 provides ultimate steadiness and comfort for everyday runs, with highly supportive cushioning. 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. The plush collar and tongue, along with the engineered mesh upper, provide comfort, support and an improved fit. A midfoot support system helps to slow the rate of ankle eversion and provides a stable platform for transition and toe-off. The full-length ReactX midsole delivers cushion, comfort and increased energy return. It's 13% more responsive than previous React technology. 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