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, engineered mesh on the upper decreases weight and increases breathability. Engineered Mesh Upper - Upgraded engineered mesh is light and breathable. ReactX and Air Zoom - Two Air Zoom units-one at the forefoot and one at the heel-work with soft, durable ReactX foam to give you a smooth, responsive ride. Waffle Outsole - Our signature Waffle-inspired rubber outsole provides durable traction and flexibility. Plush Padding - Padding on the collar, tongue, and insole give you a secure and comfortable fit. What's New? - ReactX foam midsole is 13% more responsive than previous React technology. Lighter, more breathable engineered mesh upper Product Details - Reflective Swoosh logo, overlays and laces. Not intended for use as Personal Protective Equipment (PPE). Weight - Approx. 251 g/8.8 oz (Women's US 8). Heel-to-toe drop - 10 mm. MR-10 Last - Our best, most consistent fit (same as Pegasus 40). 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. The carbon footprint of ReactX is based on cradle-to-gate assessment reviewed by PRé Sustainability B.V and Intertek China. Other midsole components such as airbags, plates or other foam formulations were not considered.