Giro Gradis Mountain Shoes Nashbar Exclusive. Exclusive to Nashbar, the Giro Gradis mountain shoes are understated stealth marvels that deliver massive bang for the buck. An injected nylon sole provides superb stiffness for pedaling efficiency while delivering just enough flex to ensure walking's an easy endeavor. Its supple synthetic leather and mesh upper is both comfortable and durable plus its breathability makes the warmest of days a breeze for your feet. A trio of wide, Velcro straps enable precision fit adjustments while dual density lugs shed mud and dirt like a champ.