BREATHABILITY: Premium engineered knit material engineered for breathability and stretch, reinforced with PWRTAPE for durability and lockdown NITROFOAM: Innovative nitrogen-infused foam technology that uses premium raw materials to provide maximum energy return PUMAGRIP: Outsole is made of durable rubber compound for multi-surface traction The upper of the shoes is made with at least 30% recycled materials. Running feels different for everyone – and that's exactly how it should be. Whether you're chasing a personal record or just chasing the feeling, Velocity 4 is built to move with you. Any runner, any time, any distance, it can endure, perform, and exceed expectations. Puma's lightest Velocity yet features a full-length NITROFOAM midsole, improved breathability with new mesh in the upper, and a PUMAGRIP outsole for the best traction in the game.