The Finer Details Upgraded breathable engineered mesh upper ReactX foam midsole surrounds forefoot and heel Air Zoom units for an energized ride. Signature waffle-inspired rubber outsole for traction and flexibility Plush collar tongue and sockliner for a secure and comfortable fit What's new? All-new ReactX foam midsole is 13% more responsive than previous React technology. Nike Mens Air Zoom Pegasus 41