Puma Liberate Nitro 2 Running Shoes have been designed for lightness and flexibility, so you have the freedom to overcome your limits. The foam and the entire shoe are very light for the amount of cushioning. A simplified mono mesh upper looks futuristic and drains water well should you encounter moisture. The V2 has firm Nitro foam for greater durability, protection and receptivity.Features: Visibility and stability through proprioception thanks to the TPU heel piece Composed of long-lasting rubber for traction on multiple surfaces The rubber in the forefoot provides rigidity and optimizes flexion and maximum traction The minimal rubber in the heel provides the right amount of durability They feature a new running last based on biomechanical research and testing, made of ultralight mono mesh Be seen from all angles when you run, whatever time of day or night Technology: Nitro The advanced technology of the Nitro midsole provides superior response and cushioning in a lightweight package.