The Finer Details Runner-informed data was used to create and place engineered mesh throughout the upper for a sturdy, lightweight and breathable feel. We placed extra skins across the toes for durability. Flywire technology is integrated with a midfoot band for total support that helps keep your foot in place. Nike React technology is a lightweight, durable foam that delivers a smooth, responsive ride. The rubber outsole has a generative traction pattern, created using data from runners like you. It gives your foot grip in key areas, helping you stay upright and stable over rocky trails, while also maintaining a smooth ride on the road. Nike Womens Pegasus Trail