Nike Structure 26 Nike Structure 26 Men's Road Running Shoe. The supportive cushioning in Structure 26 provides stability for daily runs. A full-length midsole made of ReactX allows for a cushioned yet stable rolling from heel to toe. The proven support system in the midfoot area surrounds the arch and heel for a firm foundation. The support system in the midfoot area slows the outer rotation of the ankle and provides a stable foundation for rolling from heel to toe. The full-length ReactX midsole provides cushioning, comfort and an increased energy return. Collar and tab are padded and together with the specially developed mesh upper provide additional comfort, support and an optimised fit. The cover on the outsole with foamed rubber in the forefoot provides additional cushioning. Abrasion-resistant rubber on the heel ensures increased durability. More details