The Nike Air Presto features a smooth profile and a breathable mesh upper to help keep your feet cool. Nike's trademark Phylon midsole provides another layer of lightweight cushioning. The Nike Air Presto features an environmentally-preferred recycled rubber outsole, which is crafted from scrap material leftover from manufacturing Nike footwear. The materials are ground up and purified to become a rubber that Nike affectionately calls Nike Grind. This innovative and resourceful outsole offers the same long-lasting wear and traction as conventional rubber.