This shoe has the thickest piece of NITROFOAM™ in the entire RUN PUMA line-up. Simply put, you get more of the good stuff in a shoe that is designed for comfort while you run. Beyond the nitrogen-infused foam outsole, you get an engineered knit upper and a moulded heel collar. It's maintenance in all the right places. FEATURES & BENEFITS NITRO™: Our innovative nitrogen-infused foam technology is lightweight and provides explosive energy stride after stride PUMAGRIP Outsole: Durable rubber compound that provides best-in-class multi-surface traction. ENGINEERED KNIT UPPER: Premium knit material with engineered zones for enhanced breathability and stretch DETAILS Lace closure 10mm heel-to-toe drop Recommended for: road running Mileage/Lifespan: 800km Pronation level: Neutral PUMA Formstrip on lateral side Low boot