Inov-8 RocFly G 390 Hiking Shoes - Mens Grey/Black/Yellow 7.5/ 41.5/ M8.5/ W10 000995-GYBKYW-S-01-85. The 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...