Vionic flipflops are stylish and comfortable. This pair has soft black straps with a pewter metallic trim, so they're a level up from everyday thongs, but so comfortable you can wear them all day. Grey EVA sole is cushioned and supportive. Size 8-9; 39 Eur. EUC. From the Vionic website: Vionic Technology is biomechanically designed to hug your arches and support your feet in comfort. Vionic sandals' built-in orthotic is shown to be effective in helping to treat heel pain (plantar fasciitis)."