Responsive cushioning in the Nike® Air Zoom Pegasus 42 shoe provides an energized ride for everyday road running. Experience unreal energy return with a curved, full-length Air Zoom unit and a ReactX foam midsole that's lighter than the Peg 41. An improved waffle outsole with less rubber helps decrease weight without sacrificing trusted traction. Lightweight mesh upper is softer and more breathable than earlier iterations, helping your feet stay comfortable. Signature waffle-inspired rubber outsole provides traction and flexibility. We reduced the amount of rubber as well to reduce the weight of the overall shoe.