Engineered mesh upper with a heel-to-toe drop of 10mm. Shoe weight is 267g (UK size 8). Recommended for neutral pronators. Features PUMA branding details. The Electrify NITRO™ 4 seamlessly blends NITROFOAM™ and PROFOAMLITE for a responsive ride with cushioning. With a breathable mesh upper and PUMAGRIP rubber for unbeatable traction, these running shoes are designed to propel you forward, mile after mile. Learn more about our sea glass.