Inov8 Lady Terrafly 297 GORE-TEX Waterproof Walking Boots Terrafly - Premium outsole, designed to be extremely durable, for road or trail running. EVA injected midsole - Cushions your foot when running on the toughest of terrains. Endurance Rubber Compound - This has been formulated for an optimal balance on wear and mixed terrain grip. The 3 Arrow Shoc-Zone offers scintillating performance as a race day shoe for club runners, whilst also providing sufficient under foot protection for the elite to use regularly. Gender specific - Designed to match the unique shape of the female foot with a narrower heel.