A Zoom Air unit at the forefoot gives you a light, responsive bounce when your foot connects to the track. 2 cushioned chambers within the air unit add even more stability and spring. It combines with a full-length carbon plate for a propulsive and stable feel as your foot takes off. The carbon is tuned in the midfoot and heel for a stiff feel where needed for better transition from heel to toe. Secure Steps, Light Touch A woven and synthetic upper gives you secure, lightweight containment. Notched laces means less chance of them untying mid-run. Grip the Road 7 removable spikes at the forefoot help give you the traction needed to go your fastest. A shockwave pattern on the outsole, designed from athlete data, adds extra traction along the foot where you need it most. Lightweight foam at the heel helps cushion your foot without adding weight.