Nike Ultrafly trail shoes, women's size 9.5 The Ultrafly features a carbon Flyplate in the sole, layered between ZoomX foam and a fabric-wrapped midsole. The Nike Ultrafly was designed in partnership with Vibram, a footwear company known for its high-performance rubber soles. The shoe contains Vibram's lightweight, agile outsole design and lug technology underfoot for traction. Used condition, only 20 miles ran in them.