Nike Pegasus 41 Women's Road Running Shoe The responsive cushioning in the Pegasus provides an energized ride for everyday road runs. Two Air Zoom elements and a ReactX foam midsole provide optimal energy return at a lower weight. The new, specially developed mesh in the upper material makes the shoe lighter and increases breathability. Hello, ReactX New, specially developed upper material made of breathable mesh Heb off with Zoom The ReactX foam midsole surrounds the Air Zoom elements in the forefoot and heel for an energized running experience. Wider and better The rubber outsole is inspired by the legendary waffle tread pattern and improves both traction and flexibility. Lightweight and breathable Soft collar tab and sockliner for a secure and comfortable fit Hugs the foot Innovations The all-new ReactX foam midsole is 13% more responsive than the previous React technology. The ReactX foam was designed with a focus on performance and the planet. The carbon footprint of two midsoles is reduced by at least 43% because less energy is required to produce them than the previous Nike React foam. The carbon footprint of ReactX is based on a cradle-to-gate assessment verified by PRé Sustainability B.V. and Intertek China. Other midsole components such as airbags, plates or other types of foam were not taken into account.