Electrify Nitro 3 ShoesPuma Electrify Nitro 3 Sil Women's Running Shoes Black The perfect choice for young runners, the Electrify NITRO 3 running shoe offers a progressive design, delivering cushioning and reliability for your daily jog. In a redesign of the previous models, this dual midsole has more NITRO in the heel and durable PROFOAMLITE throughout the rest of the midsole. The result is better responsiveness and ride under the foot, for a shoe that's always airy and