PUMAGRIP - The PUMAGRIP outsole is made of durable rubber and offers multi-surface traction. ENGINEERED MESH - Premium material engineered for breathability and reinforced with PWRTAPE. NITROFOAM - Innovative nitrogen-infused foam technology for lightweight responsiveness and cushioning. ROLLED COLLAR - A rolled collar construction reinforced with foam for comfort and fit. Experience an exhilarating bounce like never before with the MagMax NITRO 2. Boasting an impressive amount of cutting-edge NITROFOAM technology, these shoes will effortlessly propel you from one mile to the next, filling your stride with excitement and ease. Around the foot you’ll find a comfortable mesh, deluxe knitted tongue and cushioned heel. PUMAGRIP protects the precious NITROFOAM and provides top-notch traction keeping you steady on your feet.