The Puma Electify Nitro 3 is a progressive design that works great for all runners and any distance especially younger runners or just getting started. The two-part midsole is redesigned in our 3rd model to allow for more Nitro in the heel and durable Profoamlite throughout the rest of the midsole. More Nitro means better responsiveness and ride under the foot. This shoe remains light for the cushion offered and Pumagrip enhances safety in the outsole rubber that is 32% more grippy than rubber from the Speed line. An engineered mesh upper looks futuristic and offers great breathability. A rolled collar with plenty of cushion secures the heel for a comfortable and secure fit. The Electrify Nitro 3 is the perfect choice for the new runner looking for great cushion and value.