The New Liberate Nitro Is An Ultra-Fast Option For Short-Distance Runs And Sprints, Up To Half-Marathons. The Simple Mono-Mesh Upper Is Super-Light And Moisture-Draining, So Nothing Can Weigh You Down, Come Rain Or Shine. A Pumagrip Outsole And Nitro Foam Midsole Add Traction And Cushioning To This High-Tech Shoe.