Nike Air Max 90 Ultra Mid Winter Iconic sports style gets a cold-weather upgrade in the Nike Air Max 90 Ultra Mid Winter trainers. The cut & interior bootie combination are built to enhance coverage & comfort, while the durable rubber tread on the outsole help you run the streets even in icy weather. Nike introduced its Air Cushioning Technology in 1979 by embedding Air Cushioning in the midsoles of its trainers. Eight years later, the Nike Air unit became visible in the original Air Max trainer, ensuring unmistakable comfort you can see & feel. The Details Max Air unit offers responsive underfoot cushioning Multi-textured upper for durability; cut extends support Internal bootie extends from the collar to enhance ankle coverage Durable rubber lugs provide traction on wet or icy surfaces Multi-directional flex grooves offer flexible traction, size 8