Puma Mens Fast-R Nitro Elite 3. A Seismic Shift In The World Of Road Racing, The Fast-R NitroElite 3 Will Have You Smashing Your Personal Bests From The 5K To The Marathon. With An Upgraded NitrofoamElite Outsole, Experience Maximal Energy Return, While A Precisely Engineered Carbon-Fiber Pwrplate Gives You A Propulsive Ride From Start Line To The Finish. No Racing Shoe Is Complete Without Pumagrip Rubber, An Outsole That Will Allow You To Perform Your Best In Any Raceday Conditions. Unlock Your New Personal Best In Fast-R NitroElite 3.Style Code: 31206003 The Finer Details. NitrofoamElite: Premium Performance Foam Technology That Provides Pinnacle Responsiveness In An Extremely Lightweight Package. Pwrplate: Carbon Fibre Plate Engineered To Stabilise The Midsole While Maximising Energy Transfer. Ultraweave: Ultra-Light, Engineered Fabric With A Structured, 4-Way Stretch That Reduces Weight And Friction. Built For Athletes Looking To Increase Speed And Strength. Pumagrip: Durab