This shoe has the thickest piece of NITRO foam 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. PUMAGRIP Outsole: Durable rubber compound that provides best-in-class multi-surface traction. DETAILS Engineered mesh upper Lace closure 10mm heel-to-toe drop Shoe weight: 274g (for size UK 8) Recommended for: road running Mileage/Lifespan: 800km Pronation level: Neutral PUMA Formstrip on lateral side Material Information Midsole: 100% Synthetic Sockliner: 100% Textile Outsole: 100% Rubber Upper: 53% Textile, 47% Synthetic Lining: 100% Textile