SAUCONY Men's Xodus ISO 2 trail running shoes feature a synthetic upper. Added hot-melt vamp layer for reinforced protection. External support frame for added protection and a lockdown heel fit. 3mm EVERUNTM top-sole construction for continuous cushioning throughout the run. Trail-specific ISOFIT System with added protection that sits closer to the foot. PWR TRAC outsole design with tank tread protection for rugged durability traction and abrasion resistance.