Springy foam plus snappy Air Zoom units equals our most energized ride. Responsive cushioning in the Pegasus 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. Responsive Ride - ReactX foam midsole surrounds forefoot and heel Air Zoom units for an energized ride. It's 13% more responsive than previous React technology. Waffle-Inspired Traction - Signature waffle-inspired rubber outsole provides traction and flexibility. Plush Padding - Plush collar, tongue and sockliner provide a secure and comfortable fit. What's New? - ReactX foam midsole. Lighter, more breathable engineered mesh upper Product Details - Weight - Approx. 297g/10.5oz (Men's US 10). Heel-to-toe drop - 10mm. MR-10 Last - Our best, most consistent fit (same as Pegasus 40). Reflective details. Not intended for use as Personal Protective Equipment (PPE).