Inov-8 RocFly G 390 Hiking Shoes - Mens Grey/Black/Yellow 8/ 42/ M9/ W10.5 000995-GYBKYW-S-01-9. 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 is...