Hit the pavement and go the distance in the PUMA Kids Electrify Nitro (Big Kid) sneakers. Traditional lace-up closure offers a secure fit. NITRO FOAM: PUMA's advanced technology providing superior responsiveness and cushioning in a lightweight package. PUMAGRIP: PUMA's durable rubber compound that provides all-surface traction. ProFoam: PUMA's lightweight, high-rebound EVA midsole solution provides instant cushioning and a responsive ride. Ultra-lightweight mesh. Removable insole. Round toe silhouette. Textile and synthetic upper. Textile lining and insole. Synthetic outsole.