With a design inspired by aerospace engineering, these neutral running shoes provide reliable support and comfort as you get faster and build distance. A stability rail helps guide the foot through the gait cycle and works with responsive cushioning and a flexible outsole to deliver a smooth ride. The upper is made of lightweight, breathable mesh. Regular fit. Lace closure. Mesh upper with reflective details on heel. Durable Adiwear outsole with Stretchweb flexibility. Fitcounter heel for unrestricted fit. Responsive Boost midsole. Lightweight feel. . . . Weight: 10.8 oz.. Midsole drop: 10 mm (heel: 30 mm / forefoot: 20 mm). Arch type: Normal; Stabilizing Solar Propulsion Rail. Spot wash. Imported.