Product Story: Liberate Nitro Keeps You Light On Your Feet With An Effortless Ride. Form-Fit Around Puma�S New Performance Last Shape, Liberate Nitro Offers A Great Fit Executed In A Sturdy Mono-Mesh. A One-Piece, Nitro Midsole Delivers Just-Right Cushioning With Great Responsiveness For Tempo Runs And Competition While A Cooladapt Finish Keeps You Comfortable. To Keep You Steady And Stable, Liberate Nitro Has A Tpu Heel Piece Providing Proprioception, And Strategically Placed Pumagrip For Multi-Surface Traction.Features & Benefits Nitro Foam: Puma'S Advanced Technology Providing Superior Responsiveness And Cushioning In A Lightweight Package Pumagrip: Puma'S Durable Rubber Compound That Provides All-Surface Tractiondetails Low Boot Ultra-Lightweight Mono-Mesh? Upper With Additional Cooling Element Nitro Foam Midsole Providing Superior Responsiveness And Cushioning Pumagrip Rubber Outsole For Traction And Durability Tpu Heel Piece For Stability Reflective Branding And Spoiler? For Improved Visibility Striped Puma Formstrip At Lateral Side