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Width grade 5 on inov-8's 1-5 width scale (equates to a 2E fit in the forefoot). Named FOOTWEAR OF THE YEAR 2021 by The Great Outdoors (TGO), this is a revolutionary boot like no other. The wide fit ROCFLY™ G 390 uses a unique Graphene-infused G-FLY™ foam that supercharges your feet so you can hike further than ever before. The world-first foam is scientifically proven to deliver 25% greater energy return and retain its optimum levels of underfoot rebound and cushioning for longer, thanks to the infusion of the planet's strongest wonder material. As worn by James Forrest when hiking a new record time for a solo and self-supported 500-mile hike of Great Britain's National Three Peaks.