Zoom Through The City In This Energetic Road Running Shoe. Our Iconic Road Runner Gets A Performance Upgrade. Featuring A New Dual-density Midsole For Softer Landings And More Powerful Take-offs. Plus, A Breathable Flat-knit Upper And Cage Construction, For Secure Foot Lockdown And A Fresh Aesthetic. One-piece Knitted Upper The Shoes Snug Bootie Construction Is Updated With A Single-piece Knit For Maximum Airflow. The Perforated Toe Box Further Boosts Breathability. Dual-density Midsole For A Cushioned Yet Energetic Ride, The Midsoles Top Layer Is Made With Soft Helion™ Superfoam, While Denser Foam On The Bottom Provides A More Propulsive Push-off. Upgraded Aesthetic We Updated The Design And Fit Of The Shoes Iconic Cage Construction For Better Midfoot Lockdown. Plus, Its Now Finished With A New Knit Material For A More Modern Look. Nylon-blend Speedboard® Previously Made With Tpu, The New Nylon-blend Speedboard® Produces An Energetic And Responsive Ride. Made Using A Single Piece Of Flat-knit Engineered Mesh, The Breathable Upper Has A Snug, Sock-like Fit That Adapts To A Wide Range Of Foot Shapes. The New Dual-density Midsole Is Made With Two Types Of Helion™ Superfoam – For Soft Landings And Powerful Take-offs. Injection Molded Nylon-blend Speedboard® For An Energetic And Responsive Ride.