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. Springy Cushioning - We paired Nike ReactX foam with two Air Zoom units (one in the forefoot and one in the heel) to give you a bouncy, springy sensation and an energized feel at toe-off. Waffle-Inspired Traction - Signature waffle-inspired rubber outsole provides traction and flexibility. Plush Padding - Plush collar, tongue and sockliner for a secure and comfortable fit What's New? - ReactX foam midsole is 13% more responsive than previous React technology. Engineered mesh upper is lighter and more breathable than the Pegasus 40. Product Details - Weight - Approx. 251g/8.9oz (Women's US 8). 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).