DON’T WASTE YOUR ENERGY. Responsive cushioning in the Nike Pegasus 41 provides an energized ride for everyday road running. Experience lighter–weight energy return with dual Air Zoom units and a ReactX foam midsole. Plus, improved engineered mesh on the upper decreases weight and increases breathability. Here's what else you'll love: Upper Technology: Based on feedback from everyday runners, Nike upgraded the breathable engineered mesh upper for increased comfort. Plush collar tongue and sockliner for a secure and comfortable fit. Reflective toe and heel highlights. Midsole Technology: ReactX foam midsole surrounds dual (forefoot and heel) Air Zoom units for an energized ride. All–new ReactX foam midsole is 13% more responsive than previous React technology. Nike increased the stack heights in both the forefoot and heel for added cushioning and protection. A wider forefoot and heel provide a stable, springy platform and a responsive ride. Outsole Technology: Signature waffle–inspired rubber outsole provided durable traction on the road, with grooves for added flexibility. Specs: MR–10 Last – Nike's best, most consistent fit (same as Pegasus 40). Heel–To–Toe Drop – 10mm Cushioning – Responsive Support – Neutral Crafted for performance and planet, ReactX foam is engineered to reduce its carbon footprint by at least 43% in a pair of midsoles due to reduced manufacturing process energy compared to prior React foam. This product is made with at least 20% recycled content by weight.