fabric-and-synthetic Rubber sole stretch breathable mesh upper expand with your foot when you run and they more comfortable closely fit to help you reduce irritation. specially engineered outlook and outsole provide your every step full energy, fast and light. stretch web rubber outsole is lightweight and elastic, adapting to the ground for stability and working strategically to optimize the unique properties of every touch and push. arch support insole gives the midfoot the best support when you move. special desigin of the outsole hugs your foot properly, light and comfortable.