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Width 5 out of 5 on Inov-8's width scale (equivalent to an EE fit in the toe box). The TRAILFLY ULTRA G 300 MAX is a revolutionary wide fit trail shoe featuring the world’s first Graphene-enhanced foam, called G-FLY. The foam delivers 25% greater energy return and retains its optimum levels of underfoot rebound and comfort for longer, so runners feel faster and fresher over greater distances. Pioneering a new way for cushioned ultra running shoes, the TRAILFLY ULTRA G 300 MAX also features a unique underfoot ADAPTER-FLEX groove, allowing it to adapt and react to the terrain like no other. And that’s not all. GRAPHENE-GRIP rubber delivers the world’s toughest grip, while the supportive upper fit adapts to the natural changes of the foot when running big miles.