What is Air? You could say it's nothing—invisible, immaterial—but you could also say it's everything. And trust us, you know it when you feel it. Nike first put Air cushioning into a runner's step back in 1978 and never looked back. In fact, we keep pushing it, for elite athletes, everyday runners and everyone in between. Yes, we are totally, one hundred percent obsessed. Air is Nike innovation at its best. But it keeps getting better. So you can keep getting faster. And the women who Win On Air wouldn't have it any other way.