The Nike Zoom Fly SP is built fast for race day, but durable enough for everyday training. The combination of Flywire cables, Lunarlon foam, and a full-length place give you the perfect on-foot feel for record-breaking performances. Lunarlon foam gives you lightweight, durable cushioning with every step. Full-length carbon-infused nylon plate helps you optimize your performance. Flywire technology gives you enhanced midfoot lockdown, so you're always in control. Outsole design places optimal runner on the road for increased efficiency and ideal traction. Traction pattern is based off of an algorithm to identify lug shapes and sizes that optimize propulsion as you go. Translucent, woven constructed upper provides durable support and great stability for you entire run.