MODERN COMFORT, THROWBACK STYLE. Women's Nike Air Huarache Run Ultra SI Shoe pairs '90s style with modern comfort. Take the throwback design of the original, add bootie construction, a molded heel piece and a plush foam midsole for a solid, modern foundation. Full-length neoprene bootie provides a comfortable, sock-like fit. One-piece foam offers midsole cushioning with outsole durability. Elastic strap and rubber cage on the heel for a classic Huarache look. Rubber pods are strategically placed for durability and traction. Heel pull tab offers easy on and off.