Built for beginners and experienced runners, the Nike Air Zoom Pegasus 34 (Narrow) Men's Running Shoe features an updated, lighter Flymesh material that helps reduce heat build-up when you run. The tried-and-tested cushioning and support runners have come to love remains. Breathable Comfort The one-piece Flymesh fabric is lightweight and breathable to help keep your feet from overheating. This version of Flymesh is updated with lighter materials while still providing excellent support around your foot. Secure Fit Incredibly strong Flywire cables work together with the laces to wrap the arch of your foot for snug support, helping to keep the shoe in place as you move. A firm heel cups your heel for added stability. Responsive Feel A foam cushion works with Zoom Air units in the forefoot and heel to give you a push as you run.