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The INOV8 Trailfly Ultra Max G 300 women's shoes are neutral trail running shoes for very long distances. The breathable upper keeps your feet cool while you rack up the miles. The Trailfly is designed for very long distances on both unpaved and paved paths. Thanks to the ample cushioning and innovative sole composition, the Trailfly performs best on paved trails and paths. Walking across the road to a trail? That's no problem either, thanks to the 4mm lugs. The Trailfly features the world's first cushioning material reinforced with graphene. Graphene is the strongest and thinnest material on earth. It is made from graphite molecules. It is so thin that it is almost invisible. This thin layer is incorporated into the midsole. Graphene is 200 times stronger than steel, but is also very flexible. Because it is so flexible, the layer moves with your foot as you roll. This durable layer protects your feet while running trails without you even noticing. By incorporating Graphene into the foam, the shoes return 25% more energy than average trail shoes. This gives you a more energetic and lighter running experience, while your feet receive the best protection. Graphene is also incorporated into the outsole. The G-Grip outsole features coarse lugs that grip soft surfaces. Chances are you'll encounter paved paths or rocks during an ultra trail run. Because the outsole contains a sticky rubber, the shoes also provide optimal grip and traction. A deep groove under the arch of the foot is incorporated into the outsole. This Adapter-Flex groove gives the shoes extra flexibility, ensuring optimal grip even during unexpected strides or situations.