The Electrify NITRO™ 4 blends NITROFOAM™ and PROFOAMLITE for a lightweight, cushioned ride on your daily run. With durable PUMAGRIP, the outsole offers multi-surface traction and the perfect combination of comfort and performance. ProFoamLITE: Extremely lightweight EVA designed to cushion your landing and propel each step. NITROFOAM: Advanced nitrogen-injected foam designed to provide superior responsiveness and cushioning in a lightweight package. PUMAGRIP: Durable performance rubber compound designed for all-surface traction. The upper of the shoes is made with at least 30% recycled materials. Features: Regular width, Textile upper, Lace closure, NITROFOAM™ midsole, PUMAGRIP rubber outsole. Material composition: 68.77% Textile, 31.23% Synthetic.