It’s all about a comfortable ride with the Magnify NITRO, and this season Puma retooled this model with an engineered mesh upper and combined it with a new ‘cat’s tongue’ material to keep your feet secure. Constructed with Puma's thicket piece of nitrogen-injected NITRO foam in the midsole along with a layer of sturdy PROFOAMLITE, this shoe is built long runs where comfort is your top priority. Magnify Nitro Surge Running Shoes