The PUMA x HYROX Velocity NITRO(TM) 4 running shoe is built to handle the full demands of hybrid fitness racing. Designed for versatility, it delivers a smooth, cushioned ride through runs, reps, and everything in between. From first-time HYROX athletes to seasoned competitors, this shoe brings together comfort, responsiveness, and race-ready durability. Design Premium knit upper material engineered for breathability and stretch, reinforced with PWRTAPE for durability and lockdown The upper of the shoes is made with at least 30% recycled materials. Lace closure In-Shoe Comfort NITROFOAM(TM): New innovative nitrogen-infused foam technology compound that uses premium raw materials to provide high rebound and a lightweight ride Durability & Traction PUMAGRIP: Durable performance rubber compound designed for all-surface traction