Sock-like fit Lightweight mono-mesh upper Heel fin Heel-to-toe drop: 0 millimeters Lightweight, high traction rubber compound outsole designed for the ultimate race-day performance This Season, Ciele Is Welcomed To The Run Puma Roster To Celebrate The Culture Of Running. The Puma X Ciele Collection Is Timeless In Its Appearance, Yet Modern – And Almost Ahead Of Its Time – In The Way It Performs On A Run. And The Fast-R Nitro Elite Is A Perfect Example. The Cutting-Edge, Two-Part Midsole Features Nitro Elite Foam For Supreme Responsiveness And Pwrplate Technology To Ensure Maximum Running Efficiency And Stability. The Marathon-Worthy Racing Shoe Offers A Sock-Like Fit With A Lightweight Mono-Mesh Upper And Targeted Pwrtape Reinforcement For Added Durability And Support. The Cushioned Heel Works With A Reactive Forefoot For Peak Propulsion, While Puma Grip Provides Multi-Surface Traction Without Added Bulk. Travel At The Speed Of Lightweight With Puma And Ciele.