Taking design cues from the 998 an nb classic running favorite the numeric 598 is a simple one piece toe shoe with internal reinforcement atop a flexible cup sole giving excellent board feel our closed cell pu insert provides superior impact protectionpadded collar forcomfort and protectionbreathable mesh tonguefull revlite midsole for weight saving cushioninginternal hidden toe protection for added durabilitygenuine gum rubber or ndurance rubber outsole for superior grip and durability